Update install_pyptv_ubuntu.md

added "make cmake and python-Enable"  to the packages list
(for some reason I needed to get python-Enable even though it is in the list of ets packages)

in liboptv installation deleted autoreconf and ./configure and added cmake -G "Unix Makefile" -i

in openptv-python git clone changed the path from alexlib to OpenPTV
Update install_pyptv_ubuntu.md
Update install_pyptv_ubuntu.md

deleted autoconf package from the apt-get line
splitted the long line of apt-get packages

Following the problems Patrik encountered installing on Ubuntu we found out that the list is just too long. Splitted it into three
fixed back the bug of wrong call to img_coord - the present version in OpenPTV is using the old format.
the future versions will be changed according to the refactor branch of Yosef on Bitbucket.
Merge pull request #6 from psteinhoff/master

Added the Highpass flag to the python parameters GUI window
merged Yulia patch
removed /docs/build directory