Keep number of cached pages as instance variable.

This allows for adaptive behavior when out of memory.

git-svn-id: svn+ssh://svn.code.sf.net/p/mcomix/code@825 ef8490bc-f317-4725-81ed-e95a9aca1bcf
Bind reset zoom to KP0 instead of CTRL-KP0.

git-svn-id: svn+ssh://svn.code.sf.net/p/mcomix/code@826 ef8490bc-f317-4725-81ed-e95a9aca1bcf
Parser bugfix and more elaborate escaping on win32 in preview.

From: Ark <aaku@users.sourceforge.net>

git-svn-id: svn+ssh://svn.code.sf.net/p/mcomix/code@827 ef8490bc-f317-4725-81ed-e95a9aca1bcf
Quote function has become a bit too complicated for inlining.

git-svn-id: svn+ssh://svn.code.sf.net/p/mcomix/code@828 ef8490bc-f317-4725-81ed-e95a9aca1bcf