[Engine-XMPP] circumvent bug in facebook's own-message echo
[Build] Replaced Debug-Win32|Any with Debug/Release-Win32|x86 build configurations
[Common] fixed Crc32 overflow happening in programs built with /checked+

calling operator<< on byte calls the int overload instead of the uint overload
an explicit cast to uint prevents this
[Common(-Tests)] Force MonoDevelop to generate overflow checks

The .csproj file already contains
<CheckForOverflowUnderflow>true</CheckForOverflowUnderflow>
but MonoDevelop is ignoring that and does not add /checked+ to the compiler
invokation. Thus we pass this argument to the compiler ourself as workaround.
[Common-Tests] Added Crc32Tests
Merge pull request #29 from oli-obk/fix/crc32_overflow
[Common-Tests] Always compile test-cases with overflow checks
Merge remote-tracking branch 'github/master'
[Build-Win32] Win32 Define.cs generator
[Build-Win32] Fixing csproj files against invalid ApplicationIcon properties.
Without this, Visual Studio refuses to compile non fixed csproj.
[Engine] Removed unused and non-working SqliteMessageBuffer.cs.
Fixes Visual Studio building.
Merge pull request #35 from moonpyk/msbuild

MSBuild rework
[Build] Script to show contributors
Merge remote-tracking branch 'github/master'
[L10N] Updated German translation from Transifex
[L10N] French is now maintained without Transifex
[L10N] Updated Chinese Simp translation from Transifex
Merge pull request #32 from oli-obk/bugfix/facebook_double_echo
Merge branch 'master' into msbuild

Included are moonpyk's cherrypicks. Thanks for the fixes and better
commit messages!