Add multithreading option for filtering procedure.
* Modify bug on counting supporting read number.
* Add maximum_unique_junction option in clustering to reduce computational time for some unusual bam files.
* Improved package structure
* Add automation testing
* Incorporated with annot_utils
small bug fix for the case of SA breakpoint becomes minus position
mainly modified yaml based parameter input scheme
add header to the results
bug fix for non-junction cases