Feature/0.9.8 move javadoc css

Move Javadoc CSS file under coopr-docs; delete un-used GIFs; adjust pom.xml accordingly.
Fix build.sh to correctly build a zip if a suffix is not passed to the make_zip function.
Built and staged docs at:
  http://stg-web101.sw.joyent.continuuity.net/coopr/0.9.9-SNAPSHOT/en/
with Javadocs at:
  http://stg-web101.sw.joyent.continuuity.net/coopr/0.9.9-SNAPSHOT/en/javadocs/index.html