CompoundParser support: bugfixes + code cleanup

Needs to be tested...
Merge branch 'devqt' of https://github.com/golosio/xrmc into devqt
Added support for NIST compounds

Requires the soon to be released xraylib 2.17.0
Documentation updated: old version for the journal
Bugfix

showed up in valgrind
Typo fixed in output
Added support for ForceDetect in detectorconvolute
Improved detectorconvolute support
started doppler broadening implementation
Doppler support implemented
support for xraylib 3.0/XMI-MSIM 3.0 devel
Minor bugfixes and improvements
Merge pull request #14 from tschoonj/devqt

CompoundParser support: bugfixes + code cleanup