Remove disparity between dev and prod gulp tasks

removes `gulp dev` in favor of `gulp`

adds `gulp --rev` to produce revved asset manifest

adds `gulp --tasks` to the readme

removes postinstall script
removes bower dep

README.md

@@ -74,10 +74,10 @@ When completed, you'll be able to run the various Gulp commands provided from th
 
 ### Available Gulp commands
 
-* `gulp dev` — Compile LESS to CSS, concatenate and validate JS
+* `gulp` — Compile LESS to CSS, concatenate and validate JS
 * `gulp watch` — Compile assets when file changes are made
-* `gulp build` — Create minified assets that are used on non-development environments
 * `gulp images` — Lossless compression of PNG, JPEG, GIF and SVG images
+* `gulp --tasks` - Lists all the available tasks and what they do
 
 ## Documentation