add hlds.py as console script 'hlds-converter' to setup.py
added new output option 'textplan-featstruct', renamed 'textplan' to 'textplan-xml'
hlds.py: put cli handling into main()
Merge branch 'master' of https://github.com/arne-cl/pypolibox
Revert "set version manually in sphinx conf (rtfd.org can't parse it otherwise)"
rtfd should now be able to parse this (I enabled virtualenv setup.py install)

This reverts commit 1624bd15d8c809987373aaafa4d5d241781f4be0.
added rtfd link to docs, fixed markup
updated NEWS (release 1.0.1)
updated makefile
added further --output-format documentation