Merge pull request #1772 from raydavis/raywip

CLC-2612 Avoid memory corruption & thread proliferation on production servers
NOJIRA Update doc with postgres and X fixes for Mtn Lion
NOJIRA fix numbering
CLC-2671 Improve performance of Oracle db queries
Merge pull request #1773 from ctweney/docfix

NOJIRA Improve numbering and Mountain Lion/Mavericks setup instructions
Merge pull request #1774 from ctweney/clc-2671

CLC-2671 Improve performance of Oracle db queries
CLC-2789 Do not include canceled sections in instructing or enrolled lists