Fix a few dependency problems

- copy icu.net.dll.config to lib/$Configuration
- copy L10NSharp to lib/$Configuration
- remove icu.net.* files from lib/$Configuration in repo
- update .gitignore

Change-Id: I491b9365df9730d63c10de59dce2797a53175288
Merge branch 'FlexBridgeBeta'
Merge branch 'master' into develop