back out global and local align algorithms

These two algorithms are not tested enough to leave them in.
I will readd them once I find the time to properly test
them.

git-svn-id: https://dng.biozentrum.unibas.ch/svn/openstructure/trunk@2500 5a81b35b-ba03-0410-adc8-b2c5c5119f08