more strict rules for italic emphasis to avoid file name clashes

this additional check avoids /root/.hiddendir from italicising /root/,
because that is often used in path names
Syntax documentation rewrite for M-commands

Rewrote the syntax documentation for all commands starting with the
letter M.
Merge pull request #90 from ailin-nemui/italics-exception

more strict rules for italic emphasis to avoid file name clashes
Syntax documentation rewrite for N-commands.

Rewrote the syntax documentation for all commands starting with the
letter N.
Removed the obsolete NOTE command

I removed the binding for the NOTE command that doesn't exist anymore on
any major network.
Syntax documentation rewrite of O and P commands

Rewrote the syntax documentation of the commands starting with the
letters O and P.
Aligned the help for DEOP, DEVOICE and OP

Aligned the help for DEOP, DEVOICE and OP
Syntax documentation rewrite for Q-commands

Rewrote the syntax documentation for all commands starting with the
letter Q.
Avoid using uninitalized values.
Merge pull request #94 from dajohi/uninitialized

Avoid using uninitalized values.
Fixed an example of QUOTE

Fixed an example of QUOTE
Update NEWS
irssi-version.h should only be a phony target if build in maintainer mode
Merge pull request #96 from dgl/news-update

Update NEWS
Fixing a typo

Fixing a typo.
Removed the obsolete RPING command

The RPING command is obsolete.
Syntax rewrite for R-commands

Rewrote the syntax documentation for all commands starting with the
letter R.