Changed refs and links to /tg/station to NTstation
Changed /tg/station 13 changelog to NTstation
Small clean-up
Updated contributor list

- Changed issue reporting template link
Dated contributor list from NTstation's creation

Removed link to NTstation members due to it being blank, at least publicly
Updates contributor lists

In light of the credit requests a couple of days ago.
Merge pull request #794 from Tenebrosity/changelog

Updates changelog header