wip, also it's 4:47AM
Rename filter to select
Change Wick::IO interface

- listen! is now bind
- takes hash with :read and :write arrays (or single IO objects)
- one block argument for each object in :read
at_start is unneeded in IRC nick/user stream
Split from_array onto multiple lines
Magenta is a bit more readable than blue
current_index -> channel_index
Bring Nice's Client class a bit more in line with Basic's
Make 'sum' example a bit clearer
Rename 'sum' to 'calculator'
Gemspec
Unversion Gemfile.lock, put development deps in gemspec