res: Updated translations.
front: Eliminate some lint warnings.
front: update version in prep for 2.2.0 update
build: Revert commit 2ae556f06d (gcc 4.6 workaround)

In order not to require devs to upgrade gcc if they happen to have
version 4.7, I've decided to keep this workaround in the make file.
front: Consolidate lib loading to one location, static.

Loading SDL, core, and front-end in static constructor is all that's
needed to cover the entire app.  Moved this to GameLifecycleHandler so
that it's consolidated with the other lib loading calls.
build: Made the common C*FLAGS simply app-wide flags.

The only thing this changes is that now
 - PNG lib is compiled with all the optimizations (not just `-O3`)
 - all modules are using the CPP flag `-fvisibility-inlines-hidden`
   (not just SDL, front-end, gles2n64, gles2rice, rsp-hle, xperia)

So in theory the build configuration has changed a little.