Add Delphi-code-coverage parser for Pascal/Delphi

Add a parser for the HTML output of the Delphi-code-coverage tool.

Parse the HTML output of the D-C-C tool as it is the only format that
gives the line-by-line information necessary.

Add the capability to intialize a Delphi file, it should non-commented
code between "begin" and "end" pairs as executable.

Add a test for the new parser.