Domain Lists for Task Extraction

[Hk-tang]

The task extraction currently uses a list of generalized verbs that denote a programming task. The list is available here. However, this list is too general and causes many false positives and negatives. Implemented in the code is the functionality to use custom verb lists for the different domains, which drastically improves accuracy, but that means someone needs to make a "domain list" for the different software domains for potential libraries in that domain to use.

Currently, domain lists are disabled.