Introduced GitProject and SvnProject

Introduced GitProject and SvnProject to ease reference the tree, client and utility functions in get_cloc and get_complexity.

Introduced GitProject and SvnProject

Introduced GitProject and SvnProject to ease reference the tree, client and utility functions.

MyPy and pandas new dtypes

• Fixed handling of files with commas in the name.
• Fixed visualization of pandas example as html.
• Leveraged new pandas dtypes.
• Introduced type hints in code base.
• Switched backend to GitHub actions from travis-ci.