Adding in OSMDroid bonus pack and some MetaData changes.

Changes from Mitch Ronquillo @ XEA Services, from one of their mobile apps.
[admob] slightly updated build instruction and project properties.
Apply async changes for LoadingLargeBitmaps
Add async changes in NotePad-Mono.Data.Sqlite
Add async changes in LocalFiles sample
Update samples to use async/await

Example_WorkingWithAudio
Facebook
SearchableDictionary
Add a new async Sample AsyncImageAndroid
The sample uses the new async feature to download, save and display a large image.
Update Facebook SDK binding sample to SDK 3.0.1 with some improvements.

Now binding API is generated along with XA 4.8 API (i.e. more bindable stuff).

Parameter names are given (<JavaDocPaths>) using maven javadoc build.
totally forgot to add new Facebook binding and sample files.
[GooglePlayServices] I still had my private API key checked in. Removing.
update ActionBarSherlock binding sample to the latest version 4.4.0.
Adding in rev 9 of the Google Play Services component, deleting the old Java binding project and the google-play-services_lib directory.
Bumping the version number and version name after updating to use the Google Play Services component.
Updating the README to reflect the use of the Google Play Services component.
Some minor tweaks to the README.
Setup the MapsAndLocationDemo_V3 sample

This sample uses the the Google Play Services component.
Maps And Location Demo v2, with updated README
Cross referencing the v2 & v3 projects in the appropriate README files.