Will Hall authored Dec 14, 2015 and Will Hall committed Dec 14, 2015

Issue #2631668 by willhallonline: Replace require_once() with module_load_include() for socialcalc.inc

#1067254 - slightly better handling for PHPExcel library path + avoid catastrophic failures when CKEditor is not present

  Also include md5.js from EtherCalc to calculate stamps.

  This avoids substituting "localhost:8888" to "localhost:8000:8000".