Gracefully degrade in GNU Emacs 22.1.1

Mac OS X 10.9 (Mavericks) has Emacs 22.1.1 installed by default.
Deactivate some features and backport others.
Add drewc's nice info+

This adds some extra fontification and extra features to
the *Info* buffer.
Hide JOIN, PART, and QUIT notifications in ERC

Remove the absurd 0.5 scaling of `erc-notice-face'.
Make ERC fools less visible
Remove ERC autojoins since my bouncer handles this
Mark my newest softer-dark-theme as safe
Diminish highlight-changes-mode
Ignore generated Linux kernel module address files
Install Helm and Anything for older Emacsen

Helm only works on 24.3+.
Darken the whitespace faces in softer-dark-theme

Mark it as a safe theme.
Make the cursor green

Something I was playing with changed it to a bright red bar, and a white
bar was not visible enough.  So make it a contrasting medium green.
Disable skeletan pairs for now
Update flx to pickup a bug fix
Add drewc's nice help+ and descr-text+ packages
Set TeX as the default input method