Article CSS adjustments

Need alignment for items in right hand of footer; added classes for
random page and copyright item.
Button CSS changes

When Flagged Revisions extension is installed, the Monaco button style
interferes with its revision flagging form and requires some CSS tweaks
for its button classes.
MonoBook CSS changes

Fix expansion of TOCs to full article width, remove strange garbage on
the editOptions form adapting monobook or vector-like appearance, and
make Summary label bold.
Sprite changes

Add back sprite.copyright style for new footer item, and add view and
current items for top tab buttons that get added with Flagged Revisions
installed.
rtl CSS changes

Add fe_copyright class, not sure if styles are correct.
PayPal contribution button

For future generic PayPal contribution option (is currently hardcoded
for DoomWiki.org)
Main php mods

Add license text to left hand of footer, and fix up some issues with the
right hand of the footer too. Repaired some genuine glitches in
expansion of  user items at top of page. Also added PayPal extension;
some of this stuff needs to be generalized for use outside DoomWiki.org