Code Refactor: token_is -> left_token_is/right_token_is
Code Refactor: useful_token_is(, true) -> left_useful_token_is
Code Refactor: token_subset_is_at_idx -> right_token_subset_is_at_idx
Code Refactor: Spliting token_is
Fixes comments indentation within T_SWITCH

Addresses dericofilho/sublime-phpfmt#57