Skip lines that do not contain text in the box

This brings SublimeSelect's behavior a little closer that of SublimeText
Refactor package. Remove command dependency.

Removes view, menu, keymap, css and useless spec files
Bind directly to editor view instead of relying on buggy keymap package
Merge pull request #2 from jtokoph/fix-short-line-behavior

Skip lines that do not contain text in the box fixes#1