Disable Oauth providers be default

Unless in the test environment, Oauth providers should not be enabled
by default.
Add space to tag editor delimeter

For readability, separate tags by an additional space, not just the
comma character.
Change Tags routing expectations

Expect the 'show' action to be routable. Instead of searching the
database for ideas with the 'pg_search' gem, just show the tag with a
list of all its associated ideas. First, the 'show' action must be
routable.
Fix Tag routing specs

Tests need to specify which controller they're looking for. Tests don't
 pick up to only try to route to TagsController actions.
Remove ambiguity in 'before' block

Remove ambiguity by specifying that the 'before' block is being
executed before each 'describe' block below it.
Add 'tag/show' view spec

Expect the new 'tag/show' view to render the correct content.
Make the Tag 'show' action routable

Individual tags should be avilable to be shown with their views
consisting of a list of all of their associated ideas.
Fix link rendering in Tag partial

Fix the rendering of tag links when showing the tag partial.
Add new Tag 'show' template
Load all tags for rendering in Tags index

All tags should be loaded for view when rendering the Tags index page.
Create the new Tag 'show' action

Find the tag record to render along with a list of all of its
associated ideas.
Add attributes for Tag's Idea association

Specify the ordering of ideas when looking up 'tag.ideas' along with
the join table to look in. By default, Rails would look for the
'ideas_tags' table which doesn't exist. Instead, 'idea_tags' was
created.
Fix Tags name searching syntax
Fix tag link rendering in Idea views

HAML/Ruby were having issues correctly rendering the links with the old
syntax. Breaking up the statement into a Ruby line '-' and a HAML line
'=' fixes the issue and links should render correctly.
Update README

Write instructions for application installation and setup.