Renamed several .pr file into .h files
For fmi-* rename .pr file into .h files
Remove script to generate .pr files as these are replace by header files.
Started to integrate multithreading into sfx-algorithm.
Merge pull request #152 from stefan-kurtz/sk

Replaced remaining .pr files by header files.
Added function which fakes threaded computation.
Polished suffixgetter and setter.
add function to copy seqstart positions into sortspace.
Remove GtSuffixposbuffer.
Moved code related to output of tail into GtSSSPbuf-class.
Moved code related to GtSSSPbuf into sfx-suffixgetset.c
Code cosmetics.
Make gt_suffixsortspace_setdirect a static function.
Simplified handling of bucketleftidx.
Added cloning of suffixsortspaces, add width of bucket to be sorted.
made sortoffset a parater (namely subbucketleft).
moved gt_callenummaxpairs to esa-maxpairs.c
Code cosmetics; add comment on use of diffcover.
Removed sssp/sssplcpvalues from dcov structure.
Reordered Arguments and reformat code.