Fixed wrong ifdef order that lead to error if fftw was disabled.
Automatic guessing of fftw path, also checks MacPorts headers now
fixed error handler that suppressed most Tcl errors
> 2 cores per side work again, but LE is broken
Tightened the conditions for Lees-Edwards
Merge branch 'master' into cgdna
Renamed cg_dna_stacking to twist_stack in tcl interface.
Missing files.
Moved twist_stack into separate file.
Renamed core functions from cg_dna_stacking* to twist_stack*.
Refactoring hydrogen bond.
Finished refactoring.
Removed spourious files.
Update feature defs.
Extended Vector class by norm and dot and cross product.
Added some actual calculations.
Merge branch 'Vector_operators' into cgdna