Don't make HTML versions of the manpages anymore, not very useful.

* It's not portable to Windows as well which brought up the issue
  of why.

* The User Manual should now be used instead.
Debian: Added missing dependency for processing PNG images in rst2pdf.
Fix, standalone mode should make sure to include "hex" encoding. Issue#116.

* While doing it, also include UTF-8, which will often be used even when
  it is not the encoding of the system.
Added test case for Issue#116
New hotfix release.
Merge branch 'hotfix/0.4.7.2'