Add command for toggling the status bar
Move inline-block style definition to view
Use a span to hold the cursor position text

This fixes an issue where detaching and re-attaching the status bar
would cause the cursor position div not to be shown. The reason
why it wasn't shown is that it would get an inline display: block style
for some reason (overriding the display: inline-block), which breaks layout.
I'm guessing that this is a jQuery thing related to how it handles
hiding/showing DOM nodes.
Merge pull request #30 from atom/iz-toggle-status-bar

Provide a command for toggling the status bar
Prepare 0.42.0 release