Stable release (should be suitable for Artifact Sharing and Evaluation)

• added listing of all modules and their actions in user-friendly format
• added support to zip CK repositories in format suitable for BitTorrent
  (to optimize exchange of large artifacts)
• improved functionality to update repo descriptions
  and manage dependencies on other shared repositories
• fixed a few tiny bugs
• added support to create an entry from a given directory (importing directories)
• added "input_json" function to kernel to input JSON from console ...
• added option "@@@" to CMD to add JSON from console to input
• exchanged "@@@" and "@@" in CMD for simplicity
• improved 'edit' function with the possibility to edit not only
  meta of an entry, but also descrpition (via flag --edit_desc) -
  for example, useful to edit compiler flag description via
  $ ck pull repo:ck-autotuning
  $ ck edit compiler:gcc-49x
• adding --min flag to ''load'' function to output
  only desc and dict to console
• adding --without_files to avoid copying files
  when copying/moving CK entries (useful
  to create templates for example for benchmarks
  or data sets)