Merge pull request #15 from ozantonkal/implementing_widgets

Implementing widgets
fixed some warnings for windows
minor buitification
viz license header template
reshape continuous clouds for better performance.
added makeTransformToGlobal() function
removed Affine3f from coordinate frame constructor
removed q subfolder
temp_viz removed
beatification of test_viz
more refactoring
added comments with future work for VizImpl

added authors to license header
mesh widget implementation
mesh widget casting
Merge branch 'implementing_widgets' of https://github.com/ozantonkal/opencv into implementing_widgets