Moves basic help into a view.
Moves shortcode help into a view.
Corrects spelling.
Moves advanced and php help into views.
Updates code styling.
Adds missing text domains
Updated doc blocks.
Fixes line lengths and adds class constants.
Updates code styling for 50% of the file to psr-2.
Removes option key getters, renames option key constant.
Updates all calles to manipulate options to use the class constants.
Moves manage snippets into a view.
Updates code style to psr-2
Trims line lengths.
Updates code styling to psr-2.
Merge branch 'psr-2' into develop. Fixes #5.