Added sections for SMS, Twitter and IRC.
Fixed rst links.
Added the first of what is likely to be many William S. Burroughs quotes.
Updated you option.

While "fuck you, fuck your X and fuck Z" will be most common,
hardcoding "your" in that sequence does reduce some possibilities.
Updated execution to retain capitalisation if parameter for -f does
not match any of the functions in foad.fuck.  Retains the conversion
to lower case in general use.
Merge pull request #66 from Hasimir/master

Minor option update, major execution update