[Windows] add _sqlite3.bat
message primary key change to channel_id, id compsite key.
pendding migrate to up
Model: Channel, Message => append belongs_to parent
messages routing into channels
fix messages view routing
add_owner_id_to_channel migration
Channel model relational, and validation add.

* belongs to `owner`
* attr_accessible `short_name`
* validate owner, short_name
locale ja Add
[heroku] gem 'bootstrap-sass' go out :assets