converted necessary files for python3 compatibility using 2to3
fixed relative imports in Jinja for python3
explicit string encoding when writing to file in python3
Merged upstream master
Fix for bug #3599: cv::FileStorage does not work for std::vector of user-defined struct.
performance tests for ORB
WriteStructContext treats state of fs
Added test code for I/O of user-defined types.
More generic todict
Generalized todict implementation
Improved standalone importing behaviour and creation of nested directories
removed experimental slots
Grammar
Added link to main GitHub repo
Fixed type gPython -> Python
added jpeg with optimized coding support.
corrected some style errors found by review.
Merge pull request #2533 from kenaniah:master
Merge pull request #2379 from ngryman:optimize_jpeg
Merge pull request #2403 from hbristow:issue-3451