variable name unification between functions
added some doxygen-style comments
performance improvement: 1.1487segs/run
improve compatibility with UTF, use generic C instead of es_ES
fix instructions in README
Revert "improve compatibility with UTF, use generic C instead of es_ES"

This reverts commit e7dee60504afa8a79f1e1461ec24980784f5d34d.
performance improvement: 0.563/run
Merge branch 'incspeed' into devel
Revert "improve compatibility with UTF, use generic C instead of es_ES"
fix #1: for length>LIMIT_MAX
remove uneeded file
fix #2: clear debug output and revised #1
Merge branch 'devel'