Moved columns into a separate file (lcars-columns.less) and implemented columns with a generator (currently N of 24)
Generalized generators for stuff like rows and columns (lcars-generate.less), based columns and rows on the new generator

Signed-off-by: Martin Evans <martindevans@gmail.com>
Merge pull request #5 from martindevans/feature/columns

Moved columns into a separate file (lcars-columns.less) and implemented ...