1.5.0 - Rewritten watch task and new svg task

• rewritten watch task now handles also adding, removing, moving and renaming files on the fly. Also, issues related to nested SASS imports and hanging watcher should be now eliminated.
• new svg task to easily generate SVG icons sprites
• #208 - ability to disable adding .min to output files, while using --prod flag
• dropped support for localeOverwrites, due to implementation complexity and ability to easily replace it with new child theme created just for these overwrites
• partial Windows OS support dropped, due to implementation complexity and lack of the willingness to invest time on maintenance OS not supported by Magento platform
• deploy and browser-sync task removed