Dependency work

This pull request is a first step towards slimming down the bundle by not bundling external dependencies (Issue #2). This particular pull should remove CodeMirror from the bundle. JQuery is still pulled in by yasgui-utils, which I'll eventually send a separate pull request for. I've tested on Palladio that the yasqe.min.js is a working drop-in replacement.

Also fixed: The makeJs.js part of the build process was actually uglifying the yasqe.js file from the previous build. Verify by removing all files from the dist/ directory and running gulp. In this pull request, the uglify step is attached to the same stream as the bundle step.

Also changed: Removed error reporting from the gulp process because it was causing errors.

If people want a bundle with all dependencies, then yasqe.deps.js and yasqe.deps.min.js bundle everything.