Closes #3297
Merge branch 'master' of github.com:openframeworks/openFrameworks
Add camera begin()/end() documentation.
Move ofCamera destructor implementation to .cpp.
Remove duplicated documentation from implementation, fix spacing.
ofEasyCam documentation.
Merge branch 'master' of https://github.com/openframeworks/openFrameworks.git into rexgo
Merge pull request #3298 from bakercp/feature-documentation

Continued Camera documentation.
Closes #3299
Merge branch 'master' of github.com:openframeworks/openFrameworks
Merge branch 'master' of https://github.com/openframeworks/openFrameworks.git into rexgo