Merge pull request #12 from vosskuhle/removeTrailingWhitespace

merged
trailing white space documentation
package descriptions
Implemented `treatComments` option

The manual has not yet been adapted. Proposed addition:

```latex
\item[\verbitem{treatComments}] \lstinline!0!

When this option is set to \lstinline!1!, commented lines get a special
treatment. While they rest indented, all comment symbols (\%) in those lines
will get stacked and there will be at max one space after each set of comment
symbols. This option may be useful when \lstinline!latexindent.pl! is run
several times on the same file, while lines in that file are being commented/
uncommented in the meantime. In such a situation those lines may become ugly.
The usefulness of this option depends on your workflow.
```

Signed-off-by: Michel Vosskuhle <m.vosskuhle@uni-muenster.de>