add YARD settings
add documents of Curve
add documents of CvAvgComp
fix Curve documents
add documents of CvBox2D
Merge branch 'master' into documentation

Conflicts:
	.gitignore
add documents of CvCapture
add documents of CvChain
Merge branch 'master' into documentation

Conflicts:
	ext/opencv/cvchain.cpp
add documents of CvCircle32f
add documents of CvConnectedComp
add documents of CvContour
Merge branch 'bugfix' into documentation
add documents of CvContourTree
add yard to Gemfile
Merge branch 'OpenCV_2.4' into documentation
fix for YARD 0.8 (experimental)
Merge branch 'master' into documentation
fix some codes for YARD 0.8
add documents of CvConvexityDefect