Remove most of gittip.db (except elsewhere).

Ref #1528.
Finish removing `gittip.db` global.
Merge pull request #1734 from gittip/db-global

Remove `gittip.db` global
Bump version to 10.1.48
Bump version to 10.1.48-dev
fix the gittip.db removal
more fixes for the gittip.db removal
one more fix for the gittip.db removal
fix JSON simplates
Bump version to 10.1.49
Bump version to 10.1.49-dev