General project reestructuration to work with autotools.
Added autom4te files to gitignore.
Reestructuration of timestats library interface.
Reestructuration of auxiliar library and interface definition
(aux_library.h)
Reestructuration of recalibration library (bam_recal) and interface
definition (bam_recal_library.h).
Added script to fast compile with samtools and compbio paths.
Added common.h header for portability definitions.
Adapted recalibrate.c launcher to use new library interfaces.