Fix createdAt typo in latest migration script

sweating the small stuff.
Merge pull request #55 from BooDoo/fix/migration-add-created-at

Fix createdAt typo in latest migration script
Fix error message.
Completes 9af390a
Replace redirect_by_id link with intent/user endpoint
Consistently use mobile.twitter.com as domain for intent/user endpoint
Merge pull request #56 from BooDoo/fix/redirect_by_id-l

Consistently use mobile.twitter.com/intent/user endpoint
Unclutter index for logged in users
Replace settings/sign-up/log in sections of index with confirmation that user is logged in already
OPTION: Block unpopular accounts (< 15 followers)

Introduce `block_low_followers` option; implementation similar to `block_new_accounts`
Most changes are in stream.js: bring sequelize object in for .and/.or functions, more trace detail, main logic.
Migration script added for updating `BtUsers` table in existing database.
Non-customizable implementation of Issue #39
Can easily rebase on top of #57 if accepted
Don't treat retweets of mentions as mentions.

Fixes #25.
Remove twitter account display from Index template
Integrate feedback from @jsha in #58
Merge pull request #57 from BooDoo/index-check-logged-in

Unclutter index for logged in users
Merge pull request #58 from BooDoo/issue/39/block-low-followers

OPTION: Block unpopular accounts (< 15 followers)
Fix a few syntax issues and add test config.

Currently the only "test" is a run through closure-compiler to test for syntax
errors.
Merge pull request #64 from jsha/retweets

Don't treat retweets of mentions as mentions.
Merge pull request #70 from jsha/tests

Fix a few syntax issues and add test config.
Extract constants for age and followers.
Add testing instructions for low follower blocking.
Begin log line with string to avoid quoted output.
Bump version to 0.2.0