Drop partial naming scheme for non-partials SASS #3

Used the _fileName naming scheme to stop these files from being
compiled. This is no longer necessary in our new build process.
Delete sourcemap files #3

All sourcemaps are now inline
Create gulp build and watch tasks #3
Add package.json #3
Recompile CSS #3

Now with autoprefixer!
Update GITIGNORE #3
Merge pull request #4 from RadValentin/3-implement-a-better-build-process-with-gulp