Variable Characters-per-line

[Joshua Schmidlkofer]

The #!email line should be able to pass at least one argument, one to allow variable maximum line length.

When you use:

=== Some note ===
 {{{
 #!email

 .... 
 }}}

The email no longer fits without scroll bars.

[John Hampton]

(In [3720]) Added the option of specifying the number of columns to use for wrapping. 0.11 branch is tested, 0.10 is untested, though should work fine. Closes #2584