Revised the dichotomy of par_mpi.c, changed the pre-calculating strategy
of the nodes which have finished their work ahead of others. In this version,
they tends to precalculate a heavier task in advance ( Nloc = (Nloc+Nup)>>1 )
Revised seq.c. EPSILON <- X0*relEPSILON
Merge branch 'master' of https://github.com/francktcheng/BSERROR

Conflicts:
	doc/report/report.aux
	doc/report/report.log
	doc/report/report.pdf