* make merge more efficient
* fix offsets
* merge works with relative indices
* remove printing
* Add the SCA
* fix SCA date
* more cythonize _retokenize.pyx
* more cythonize _retokenize.pyx
* fix only declaration in _retokenize.pyx
* switch back to absolute head
* switch back to absolute head
* fix comment
* merge from origin repo
Moshe Hazoom