Added initial opa-js-mode.el file. [fix] utils: Removed debug statements from opa-js-mode.el. [fix] utils: Updated load advice in opa-js-mode.el. [feature] utils: Added opajs vim mode (just some fiddles with keywords). [feature] utils: Record types for opa-js-mode. [feature] utils: Renamed opa-mode to opa-classic-mode. [feature] emacs modes: Updated installer and emacs startup files for opa-js-mode.