Merge pull request #67 from soul2zimate/master

centralize constants and bug fix.
Refactoring to streamline processor code
Merge pull request #68 from Gonthim/master

Refactoring to streamline processor code
Refactoring and fixing a bug in bug-getting process to prevent null
values in the bug list.
Merge pull request #69 from Gonthim/master

Refactoring and fixing a bug in bug-getting process to prevent null values in the bug list.
Refactoring a bug fixing.

 * Link recognization in description. Bug links are simply matched. Not
checked to exist.
 * New upstream matching patterns.
Merge pull request #71 from Gonthim/master

Refactoring a bug fixing.
Adding functionality to modify github labels.
Merge pull request #72 from Gonthim/master

Adding functionality to modify github labels.