Add README.md for walletdb and bdb driver.

walletdb/README.md

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+walletdb
+========
+
+[![Build Status](https://travis-ci.org/conformal/btcwallet.png?branch=master)]
+(https://travis-ci.org/conformal/btcwallet)
+
+Package walletdb provides a namespaced database interface for btcwallet.
+
+A wallet essentially consists of a multitude of stored data such as private
+and public keys, key derivation bits, pay-to-script-hash scripts, and various
+metadata.  One of the issues with many wallets is they are tightly integrated.
+Designing a wallet with loosely coupled components that provide specific
+functionality is ideal, however it presents a challenge in regards to data
+storage since each component needs to store its own data without knowing the
+internals of other components or breaking atomicity.
+
+This package solves this issue by providing a namespaced database interface that
+is intended to be used by the main wallet daemon.  This allows the potential for
+any backend database type with a suitable driver.  Each component, which will
+typically be a package, can then implement various functionality such as address
+management, voting pools, and colored coin metadata in their own namespace
+without having to worry about conflicts with other packages even though they are
+sharing the same database that is managed by the wallet.
+
+A suite of tests is provided to ensure proper functionality.  See
+`test_coverage.txt` for the gocov coverage report.  Alternatively, if you are
+running a POSIX OS, you can run the `cov_report.sh` script for a real-time
+report.  Package walletdb is licensed under the copyfree ISC license.
+
+This interfaces provided by this package were heavily inspired by the excellent
+boltdb project at https://github.com/boltdb/bolt by Ben B. Johnson.
+
+## Feature Overview
+
+- Key/value store
+- Namespace support
+  - Allows multiple packages to have their own area in the database without
+    worrying about conflicts
+- Read-only and read-write transactions with both manual and managed modes
+- Nested buckets
+- Supports registration of backend databases
+- Comprehensive test coverage
+
+## Documentation
+
+[![GoDoc](https://godoc.org/github.com/conformal/btcwallet/walletdb?status.png)]
+(http://godoc.org/github.com/conformal/btcwallet/walletdb)
+
+Full `go doc` style documentation for the project can be viewed online without
+installing this package by using the GoDoc site here:
+http://godoc.org/github.com/conformal/btcwallet/walletdb
+
+You can also view the documentation locally once the package is installed with
+the `godoc` tool by running `godoc -http=":6060"` and pointing your browser to
+http://localhost:6060/pkg/github.com/conformal/btcwallet/walletdb
+
+## Installation
+
+```bash
+$ go get github.com/conformal/btcwallet/walletdb
+```
+
+## Examples
+
+* [Basic Usage Example]
+  (http://godoc.org/github.com/conformal/btcwallet/walletdb#example--basicUsage)  
+  Demonstrates creating a new database, getting a namespace from it, and using a
+  managed read-write transaction against the namespace to store and retrieve
+  data.
+
+
+## License
+
+Package walletdb is licensed under the [copyfree](http://copyfree.org) ISC
+License.

walletdb/bdb/README.md

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+bdb
+===
+
+[![Build Status](https://travis-ci.org/conformal/btcwallet.png?branch=master)]
+(https://travis-ci.org/conformal/btcwallet)
+
+Package bdb implements an driver for walletdb that uses boltdb for the backing
+datastore.  Package bdb is licensed under the copyfree ISC license.
+
+## Usage
+
+This package is only a driver to the walletdb package and provides the database
+type of "bdb".  The only parameter the Open and Create functions take is the
+database path as a string:
+
+```Go
+db, err := walletdb.Open("bdb", "path/to/database.db")
+if err != nil {
+	// Handle error
+}
+```
+
+```Go
+db, err := walletdb.Create("bdb", "path/to/database.db")
+if err != nil {
+	// Handle error
+}
+```
+
+## Documentation
+
+[![GoDoc](https://godoc.org/github.com/conformal/btcwallet/walletdb/bdb?status.png)]
+(http://godoc.org/github.com/conformal/btcwallet/walletdb/bdb)
+
+Full `go doc` style documentation for the project can be viewed online without
+installing this package by using the GoDoc site here:
+http://godoc.org/github.com/conformal/btcwallet/walletdb/bdb
+
+You can also view the documentation locally once the package is installed with
+the `godoc` tool by running `godoc -http=":6060"` and pointing your browser to
+http://localhost:6060/pkg/github.com/conformal/btcwallet/walletdb/bdb
+
+## License
+
+Package bdb is licensed under the [copyfree](http://copyfree.org) ISC
+License.