Add failing spec for KDE Configuration with braces in setting names

Refer https://github.com/puppetlabs/puppetlabs-inifile/pull/131
Simplify SECTION_REGEX
Simplify COMMENTED_SETTING_REGEX to match SETTING_REGEX
Add spec for #123

I may have made this configuration file up
Fix Ruby 1.9.3 build
Merge pull request #134 from johnsyweb/less-restrictive-setting-names

Less restrictive setting names