Save theme mtimes; parameterize copyright year
Adds prev_theme_customization getter/setter
Moves misplaced <div> tag
Adds theme recompile view

Adds a view and associated ThemeController method that recompiles the
current theme. It reloads the theme (possibly updating the template
overrides with recent code changes), then recompiles the customizations.
Adds LESS stylesheet to be included by all themes

Overrides Bootstrap styles, or otherwises sets global (to all themes)
styles.

In this particular case, overrides a Bootstrap style that was causing
radio and checkbox labels to appear a line below the input buttons,
rather than inline. This was effecting the rendering of the commpanel
and a few other pages.
Merge pull request #896 from learning-unlimited/theme-tweaks

Theme tweaks