Converts saveload to protobuf
Replaces protobuf 2.5.0 with protobuf 2.4.1

This is the version of protoc in the ubuntu repos.
Implements rough framework of custom elements proto on both sides

No crashing yet, as far as I can see! Just some weird behavior
that needs to be ironed out.
Fixes native loading of custom elements
Fixes collision and base element loading in native load

Custom elements saving/loading appears to work with ZERO crashes
now!! Next TODO item: backwards compatibility in the form of a
conversion tool.
Changes to C++ for all native code
Moves to filename for save files
Fixes up custom element loading in save files
Merge branch 'master' of github.com:IDKJava/the-elements
Merge branch 'master' into custom-elements-overhaul
Cleans up collisions and UI changes
Implements basic backwards compatibility
Cleans up SplashActivity look, adds backing up of converted files
Comments collisions.cc
minor whitespace/ui
Merge pull request #37 from IDKJava/custom-elements-overhaul

Custom elements overhaul -- mostly protobuffer