Move taps and sqlite to development group in Gemfile

Change-Id: I696ab849fea466a234a6ee72b2dd564fad484a91
Reviewed-on: https://gerrit.causes.com/22687
Tested-by: Aiden Scandella <aiden@causes.com>
Reviewed-by: Joe Lencioni <joe.lencioni@causes.com>
Switch to non-deprecated Gemfile syntax

It's the future.

Change-Id: Ib8e771eba79edf17a8986f262adbc172e5fb9bec
Reviewed-on: https://gerrit.causes.com/22689
Tested-by: Aiden Scandella <aiden@causes.com>
Reviewed-by: Joe Lencioni <joe.lencioni@causes.com>
Remove 'taps' gem

Did not appear to be used; works fine in development without it.

Change-Id: I878f557218fe35d545559afd173704604e738026
Reviewed-on: https://gerrit.causes.com/22690
Tested-by: Aiden Scandella <aiden@causes.com>
Reviewed-by: Joe Lencioni <joe.lencioni@causes.com>