* renamed TChmReader to TITSReader and moved the chm
specific stuff to TChmReader descended from TITSReader.
* changed how TITSReader looks up files. It no longer reads
all the entries into memory but look them up efficiently
as needed
* added a ChmCompareText function that is compatible to
how the archive expects the files to be ordered
git-svn-id: trunk@11441 -