Prettifies the osx dmg

Adds a new background image, along with precisely located icon files.
Also updates the icon files to have white backgrounds. The icon files were
created using the 256px icon used in the ubuntu build.

packaging/osx/lbry-osx-app/dmg_settings.py

@@ -0,0 +1,11 @@
+badge_icon = 'app.icns'
+icon_locations = {
+    'LBRY.app':     (115, 164),
+    'Applications': (387, 164)
+}
+background='dmg_background.png'
+default_view='icon-view'
+symlinks = { 'Applications': '/Applications' }
+window_rect=((200, 200), (500, 320))
+files = [ 'LBRY.app' ]
+icon_size=128

packaging/osx/lbry-osx-app/setup_app.sh

@@ -9,10 +9,9 @@ ON_TRAVIS=false
 
 rm -rf build dist LBRY.app
 
-pip install wheel
+pip install wheel dmgbuild jsonrpc
 # the default py2app (v0.9) has a bug that is fixed in the head of /metachris/py2app
 pip install git+https://github.com/metachris/py2app
-pip install jsonrpc
 
 mkdir -p $tmp
 cd $tmp
@@ -73,7 +72,7 @@ fi
 # LBRYCRDD_URL="$(curl https://api.github.com/repos/lbryio/lbrycrd/releases/latest | grep 'browser_download_url' | grep osx | cut -d'"' -f4)"
 LBRYCRDD_URL="https://github.com/lbryio/lbrycrd/releases/download/v0.3.15/lbrycrd-osx.zip"
 wget "${LBRYCRDD_URL}" --output-document lbrycrd-osx.zip
-unzip lbrycrd-osx.zip
+unzip -o lbrycrd-osx.zip
 python setup_app.py py2app --resources lbrycrdd
 
 chmod +x "${DEST}/dist/LBRY.app/Contents/Resources/lbrycrdd"
@@ -105,5 +104,4 @@ codesign -vvvv "${DEST}/dist/LBRY.app"
 rm -rf $tmp
 mv dist/LBRY.app LBRY.app
 rm -rf dist "${NAME}.${VERSION}.dmg"
-# TODO: make this pretty!
-hdiutil create "${NAME}.${VERSION}.dmg" -volname lbry -srcfolder LBRY.app
+dmgbuild -s dmg_settings.py "LBRY" "${NAME}.${VERSION}.dmg"