Makefile: add -funsafe-loop-optimizations
Geo/{Math,FlatPoint}: convert a few gcc_const to gcc_pure

gcc_const was wrong because these functions/methods took reference
arguments.  Fixes a the failing unit test TestEarth with DEBUG=n.
Projection: remove obsolete prototype GetMapResolutionFactor()
EGL/Queue: explicitly cast mouse_[xy] to int
Merge branch 'master' of git://github.com/hjr/XCSoar
release v6.5_alpha2
Airspaces: add gcc_unused to debug variable "found"

Suppress gcc warning.
*: use emplace_back() instead of push_back()

Reduces runtime overhead.
PolarStore.cpp: New handicaps from DAEC 2012
PolarStore.cpp: Handicap changes reviewed, minor correction on names.