Fix bug in subsetting handling for new settings

Our new state variable `@quote_char` was not being initialized
property if you used `ini_subsetting` for a setting that did
not yet exist.  This fixes that bug.
Update CHANGELOG and Modulefile for 0.10.3 release
Merge pull request #47 from cprice-puppet/bug/master/better-handling-of-quotes-for-subsettings

Bug/master/better handling of quotes for subsettings