Added smallskipmode.
Added 'versionmark' and 'rmhead' options

Also changed appearence of the \CmCover command.
Versionmark now uses the background package instead of fancyhdr.
Corrected mistake regarding the 'rmheads' option.

At first rmheads was enabled by default and would try to affect
the chapter headings as well, even in documents whithout chapter
or part command.
Introduced convention Id -> id, added some more operators.

Convention to write the identical map in lower case letters.
Added sets like GL, SL, ric and Ric, etc.
Added smallskip mode support for marginthm mode.
Added commands to put text in double quotes (\CmQ).

This includes explicitly the commands \ProofLeft and \ProofRight, producing
sth. like "=>" and "<=" to show a certain direction in proofs.
Added commands for quotes and added language depended math operators.
Updated documentation entry.
Added option to use italic font for marked phrases.
Added operators for order and galois group.
Added operator for scalar curvature.
Added rank operator.
Established compatibility with background v1.0.