Issue #129 - refactor in progress

--HG--
rename : extension/modules/iniFiles.jsm => extension/modules/IniFile.jsm
Issue #129 - refactor done

placeholder variables.jsm removed too
Issue #129 - descriptions
Merge pull request #14 from xabolcs/branch-issue-129-platform-changeset

issue 129 refactor done, with descriptions
Merge pull request #15 from tonymec/branch-issue-129-platform-changeset

merge refactoring from xabolcs/nightlytt