Fixup of a problem in the configure.py script

- Fixed a problem in the CXXFLAGS/LDFLAGS parsing functions
  that caused the script to hang.
Merge branch 'develop' of github.com:matus-chochlik/oglplus into develop
Minor update of web index page

- Added a link to the GitHub repository page.
Minor update of the Spectra example.
Merge branch 'develop' into feature-oalplus