partial work. somehow working version

[git-p4: depot-paths = "//depot/private/jchin/HBAR-DTK/": change = 122619]
   add get_preads.py, a modified version of generate_preassemble_reads.py

[git-p4: depot-paths = "//depot/private/jchin/HBAR-DTK/": change = 122658]
   work all the way to the PA now

[git-p4: depot-paths = "//depot/private/jchin/HBAR-DTK/": change = 122659]
   bug fixed working version

[git-p4: depot-paths = "//depot/private/jchin/HBAR-DTK/": change = 122662]
   yet another revision to make it more functional....

[git-p4: depot-paths = "//depot/private/jchin/HBAR-DTK/": change = 122693]
   include CA

[git-p4: depot-paths = "//depot/private/jchin/HBAR-DTK/": change = 122702]
   "0" is not a fragment

[git-p4: depot-paths = "//depot/private/jchin/HBAR-DTK/": change = 122973]
Merge remote-tracking branch 'p4/master'