Update signal handling
- Pass user readable signal name string.
- Pass signal number as exit code w/ std::exit()
- Change global signal handler name to ofSignalHandler().
Tabs to match local code style.
include ofAppBaseWindow by default. Closes #3190
addons: ofxOpenCv includes breaklines
Merge pull request #3045 from bakercp/feature-ofSigHandler

Enhanced Posix Signal Handling
Merge branch 'master' of github.com:openframeworks/openFrameworks
fixes exit sequence
fix exit callbacks
CHANGELOG exit callbacks
armv6: fix detection of RPI version when cross compiling
eclipse cproject: fix semantic analisys by explicitly setting c++11 define
opencv includes breaklines
Merge branch 'master' into feature-YUV
ofVideoGrabber/Player: initialize 1 texture on construction to avoid crashes and report isInitialized correctly