Updated to MonoGame 3.6 + Directory refactor

- Barotrauma's projects are in the Barotrauma directory
- All libraries are in the Libraries directory
- MonoGame is now managed by NuGet, rather than referenced from the installed files (TODO: consider using PCL for easier cross-platform development?)
- NuGet libraries are not included in the repo, as getting the latest versions automatically should be preferred
- Removed Content/effects.mgfx as it didn't seem to be used anywhere
- Removed some references to Subsurface directory
- Renamed Launcher2 to Launcher

Libraries/SharpFont/.gitignore

@@ -0,0 +1,52 @@
+#Output Directory
+/[Bb]inaries
+
+#OS junk files
+[Tt]humbs.db
+*.DS_Store
+
+#Visual Studio files
+*.exe
+*.pdb
+*.user
+*.aps
+*.pch
+*.vspscc
+*.vssscc
+*_i.c
+*_p.c
+*.ncb
+*.suo
+*.tlb
+*.tlh
+*.bak
+*.[Cc]ache
+*.ilk
+*.log
+*.lib
+*.sbr
+*.sdf
+ipch/
+obj/
+[Bb]in
+[Dd]ebug*/
+[Rr]elease*/
+Ankh.NoLoad
+
+#Tooling
+_ReSharper*/
+*.resharper
+[Tt]est[Rr]esult*
+
+#Subversion files
+.svn
+
+# Office Temp Files
+~$*
+
+#MonoDevelop files
+*.userprefs
+*.pidb
+
+#NuGet
+*.nupkg