Merge remote branch 'upstream/master'
Changed CMake files and #includes to allow Qt5 while still being backwards compatible with Qt4. Add Qt5 (qtbase) directory to CMAKE_PREFIX_PATH to use Qt5.
Qt5OpenGL includes were not included correctly
V8 javascript engine update, intermediate commit #1 (broken)
Merge branch 'master' of git://github.com/gwaldron/osgearth
Merge pull request #379 from dsallen/topic-hiddencontrols

Fixes for two things:
Symbol Factory
Merge pull request #380 from remoe/symbol_factory

Symbol Factory
Tweak to Remo's SymbolFactory commit

The parseSLD code path should be ran over all of the registered symbols,
not just the one that was created by the factory.
Added a parseSLD function to SymbolRegistry and using that in
Style::fromSLD.
vp work in progress
VP: fix small bug in refactor; add docs
Merge branch 'master' of github.com:gwaldron/osgearth
Fix #381 ElevationQuery does not work properly in cache-only mode
TerrainLayer: changes the default maxLevel setting to 30 (was 99)
Update AltitudeSymbol.cpp

Typo. Thanks jaekoo.
Merge branch 'upstream/master'
setTimeout should be static
add http connect timeout
Merge pull request #382 from remoe/patch-1

Update AltitudeSymbol.cpp
ShaderGen: add support for ClipNode/gl_ClipVertex