Log Message:
Update to 0.67

Upstream changes:
0.67 Fri Aug  8 00:37:17 BST 2014
 - Remove WriteInlineMakefile.
 - Make "use Inline" keywords case-insensitive.
 - Add a devel ILSM test for running before release

0.66 Fri Aug  1 00:43:36 BST 2014
 - Change Inline::Config check to avoid false positives

0.65 Wed Jul 30 04:18:50 BST 2014
 - Update docs and M14_usage_Config error message

0.64 Sat Jul 19 22:19:18 BST 2014
 - Instrument "Inline::Config" error
 - Lock reading as well as writing of config file
 - Prevent adding non .pm modules to the Makefile