remove codecell override
set highlight mode to ruby in custom.js
add kernel_info and status messages
change profile creation

- remove `iruby_` prefix
- default profile is just `ruby`
- add config to ipython_config.py so it affects all front ends (console, qtconsole, notebook)
remove Python-style __call__
update how kernel starts
update gem spec and README
start takes no argument
return nil on flush
fix displayhook invocation

nothing to display for nil result
Append newline to puts in OutStream
Rename gem for custom release
Fix string concatenation in puts

(How ironic)
Bump version
Merge remote-tracking branch 'runa/master'
Merge remote-tracking branch 'jnv/master'

Conflicts:
	lib/iruby/version.rb
cleanup
v0.1.0
CONTRIBUTORS file added
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