2. Modified according to the feedback of the community.

Added bugfixes
- Changed CV_WINDOW_NORMAL to 1
- Changed the help function to static
- Added extra help information on mask specifics

Update on the class to reflect the review. Split the class into virtual and implementation. change of name to LineSegmentDetector, using Input/Output-Arrays, general clean ups.

Neumann L., Matas J.: Real-Time Scene Text Localization and Recognition, CVPR 2012.

High-level C++ interface and implementation of algorithm is in the objdetect module.
C++ example, a test image, and the default classifiers in xml files.

converted it to abstract interface

removed set/get methods from Algorithm (implement owns)
removed GHT_* enumeration

* converted it into Algorithm