Introduction of minimal cut set analysis in indexed fault tree.
Bug fixes for nulled sets in indexed fault tree.

There is a memory leak in the analysis, which is evident on 200 event
tree.
Remove the previous core code for minimal cut set finding.
Re-introduction of limit order for cut set generation.

Currently this implementation is not fully working. There seem to issues
with consistent results.
Remove unnecessary GoogleTest files.

Some compiler and builder specific files are removed. In case they are
needed, they can be download from the trunk.
Suppress 200 event tests due to current memory leak.