v1.0.0

Hopefully integrating all the little changes, bugfixes, and modifications that I've wanted to do for a while.

• [New] Omniboard::document= is available if you just want to set Omniboard's document variable by yourself without all that hassle of loading from file.
• [New] If your document has no fetcher, it's always considered to be at head.
• [New] Substantial changes to how groups work. You may now return any object from a group_by method, and use that object to sort your groups before displaying names. See the Readme for more information on how to use the updated groups.
• [New] You can now custom colour your groups! See the Readme for more information.
• [New] The column's icon methods may now return an array of [icon, alt], for supplying popup information on icons.
• [New] You can add a "refresh" link to the top of the page using the refresh_link property inside config.
• [New] Setting hide_dimmed on a column will automatically hide dimmed projects on page load
• [New] Set project counts using the display_project_counts property on columns. Can be set to all, active, or marked.