nsIURL doesn't seem to work anymore, so add Zotero.Utilities.parseURL(),
which uses the `url` package from NPM and adds fileName, fileExtension,
and fileBaseName.
* Remove gulp, replace with custom scripts
* Symlink entire dirs where possible (fixes#1232)
* Significantly speed up subsequent builds (fixes#1238)
* Watch process now observes new/removed files, not only changed
* Add ignoreMask, exclude all files with names starting with a #
* Better logging during builds
* Update travis.yml to use new, non-gulp-based build
