Added Drush integration; Minor textual updates. Referencing jquery.maskedinput-1.3.js instead of jquery.maskedinput.js

Removing jquery.maskedinput.js from repository; Adding dependency and integration with the libraries module;

Adding an element validator for "numeric" field values; Implementing hook_field_widget_error, just in case.

/#1226720 by helior: checking for element info properties in hook_field_widget_info to prevent php notices in case of alters.

1210212 by primsi: matched widget form with field type's schema to properly save data; added additional compatible field types to field widget; minor documentation update via coder module's nitpicking.