Corrected the settings of .hgignore about coverage and added more.
Corrected the settings of .hgignore about coverage and added more.

* Both coverageResults and .coverage are in Melange root directory
rather than tests/, so corrected them.
* Added more common files that should be ignored to the ignore list.

SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange