Added models for tags
Added views for tags
Basic implementaion of tags

Have to add a few more endpoints later.
Added a model for the tag-idea relationship
Alembic Overhaul

Re-named all the version files in a chronological order starting from a.

Added scripts for the tags and tagging tables.
Tagname made Unique with max length 50
Removed stuff from Tagging model
Updated Views for Tags

Creation now uses the Parser.

GET view for both tag_id and tagname.

DELETE view only for tagname. tag_id one can be added later.
Added tags/ideas properties

A list of Idea IDs are displayed when viewing the data of a tag.

Whereas, a list of Tagnames is displayed when viewing the data of an
idea.