Removed obsolete line
Default tasks specified as Mango.defaultTasks
Refactored the watch sources task to fix a gaze bug ignoring absolute paths

- removed gulp-filter as obsolete
- removed gulp-watch as not needed anymore (native gulp.watch works just fine)
- removed minimatch as obsolete
Refactored the watch_reload task to follow a watch_sources style
package.json: removed obsolete and updated dependencies to the latest version