Sign unityscript assemblies when building from classlibs build script.
bsearch behavior is undefined when 'key' param is a null-ptr (on android 'undefined' sometimes means calling abort)
android; disabled shared handles
shared handles; don't install atexit(handle_cleanup) if shared handles are disabled (atexit() is called at process termination; not at dlclose() - which fails on platforms with a dynamically loaded mono lib)
Enable thumb support for BB10, improve NDK auto download to use internal mirror
Only stop/start/push threads registered manually with the GC on Windows.
Only stop/start/push threads registered manually on OSX and iOS.
Don't push threads which are not suspended on Win32. Fixes a race condition described on GC mailing list where a new thread is being created during suspension process. Should avoid another cause of GetThreadContext failues.
Use GC_bool for should_scan variable rather than LONG.
Merge pull request #57 from Unity-Technologies/mono-bisect

Enable thumb support for BB10, improve NDK auto download to use internal...
Revert "Sign unityscript assemblies when building from classlibs build script."

This reverts commit 2feb13aa4cfdba91f093ceb51509f13a0d3e8da4.
Merge pull request #60 from Unity-Technologies/unity-staging

Android (general) fixes, BB10, and GC threads