Preperation for release 1.0.3

SASS 3.2.6 is out, this fixes the watch mojo because of the update of the 'Listen' gem.
I also added some documentation (an example) for the new resources configuration.
Fixed a warning from the new Listen version (see commit statements below).

Commit statements:
Update: readme ready for 1.0.3 release
Fix: Added gem 'rb-fsevent' because Listen gem gives the following warning:
[Listen warning]:
  Missing dependency 'rb-fsevent' (version '~> 0.9.1')!
  Please run the following to satisfy the dependency:
    gem install --version '~> 0.9.1' rb-fsevent

  For a better performance, it's recommended that you satisfy the missing dependency.
  Listen will be polling changes. Learn more at https://github.com/guard/listen#polling-fallback.