Merge pull request #1 from minrk/master

ffi-rzmq and some fixes by minrk
delete .rvmrc
Replace zmq for ffi-rzmq in Gemfile
Add missing `metadata` key in `pyout` reply
Add term-ansicolor dep for pretty-printing exceptions
Better exception formatting
Return #inspect instead of #to_s as "last expression" output
fix ANSI color in #format_exception
remove Pry from deps
Delete unused and deprecated frontend files
Add info about this fork on README
fix link to minrk's fork
Write script for creating IPython profiles, update README on usage
remove unused example file?
Create static/ directory for JS/CSS customizations
Symlink static/ dir when creating a profile
fix indentation in patch
Add custom logo
Temporal workaround for hardcoded Ruby mode in CodeCell component
update Ruby Notebook