add requirements.txt so we can have repeatable builds

requirements.txt

@@ -0,0 +1,27 @@
+Twisted==16.0.0
+Yapsy==1.11.223
+appdirs==1.4.0
+argparse==1.2.1
+colorama==0.3.7
+dnspython==1.12.0
+ecdsa==0.13
+gmpy==1.17
+jsonrpc==1.2
+jsonrpclib==0.1.7
+https://github.com/lbryio/lbryum/tarball/master/#egg=lbryum
+leveldb==0.193
+miniupnpc==1.9
+pbkdf2==1.3
+protobuf==3.0.0b2
+pycrypto==2.6.1
+python-bitcoinrpc==0.1
+qrcode==5.2.2
+requests==2.9.1
+seccure==0.3.1.3
+simplejson==3.8.2
+six==1.10.0
+slowaes==0.1a1
+txJSON-RPC==0.3.1
+unqlite==0.2.0
+wsgiref==0.1.2
+zope.interface==4.1.3