[Build] Save stylesheets to proper location

Updates the stylesheet task to output CSS in the correct locations. Remove
config.rb for running compass manually, and remove compiled css files from
project.  Add a .gitignore to ensure they don't get included accidentally.

Add a gulp task for running the development server and watching for scss
changes at the same time.

resolves https://github.com/nasa/openmctweb/issues/238

platform/commonUI/themes/snow/res/config.rb

@@ -1,26 +0,0 @@
-# Require any additional compass plugins here.
-# require "compass-growl"
-
-# Set this to the root of your project when deployed:
-http_path = "/"
-css_dir = "css"
-sass_dir = "sass"
-images_dir = "images"
-javascripts_dir = "js"
-
-# You can select your preferred output style here (can be overridden via the command line):
-# :expanded, :compressed, :nested
-output_style = :nested
-
-# To enable relative paths to assets via compass helper functions. Uncomment:
-relative_assets = true
-
-# To disable debugging comments that display the original location of your selectors. Uncomment:
-# line_comments = false
-
-
-# If you prefer the indented syntax, you might want to regenerate this
-# project again passing --syntax sass, or you can uncomment this:
-# preferred_syntax = :sass
-# and then run:
-# sass-convert -R --from scss --to sass vfn_platform/static/sass scss && rm -rf sass && mv scss sass