Tidy up metadata

[moschlar]

E.g. check author strings and emails and contributor lists in the major packages!
It's just a general housekeeping task related to #83 ;)

• Edit Github repo descriptions

[moschlar]

I think I did this for tw2.{core,forms,devtools} in the meantime.

[moschlar]

• tw2.dynforms
• tw2.jquery
• tw2.sqla