Remove VS Mono 3.2.3 Profile build requirement

Previously I had manually set up my box to support telling Visual Studio
that I wanted to build using Mono 3.2.3 framework. This setup, however, is
relatively hacky and doesn't promote easily working with the code.

The reason this was done in the first place was to facilitate running the
APIServer under Linux. So now I have instead implemented a 'Mono'
configuration, which when specified only builds the APIServer libraries
and ensures that all framework dlls are pointed to. To build the solution
under mono simply use xbuild like so:

  xbuild /p:Configuration=Mono GuildWars2.sln

This will build the APIServer and associated libraries and place them in
the corresponding bin/Mono directories.
Remove Scarlet Briar invasion events

These events are no longer present in the latest builds of the game, so no
point in wasting time checking for them.
Remove unnecessary source in favor of NuGet

When using the VS Mono Profile hack, it was necessary to avoid the use of
NuGet packages since VS would complain about which framework the DLLs were
compiled against. Now that we are letting Mono do it, this patch removes
the source-compiled versions of those packages in favor or using NuGet to
manage them.
Merge branch 'master' of github.com:cvpcs/GuildWars2

Conflicts:
	GuildWars2.ArenaNet.Test/GuildWars2.ArenaNet.Test.csproj
	GuildWars2.GoMGoDS.APIServer.Test/App.config
	GuildWars2.GoMGoDS.APIServer.Test/GuildWars2.GoMGoDS.APIServer.Test.csproj
	GuildWars2.GoMGoDS.APIServer/sqlite3.dll
	GuildWars2.GoMGoDS.Test/GuildWars2.GoMGoDS.Test.csproj
	GuildWars2.sln