Remove system files from version control.
Check for non-empty array before looping through the arrays.
Cleaned up source readability for parameters output.  Fixed missing </span> closing tag for required parameter. Added <span> around parameter description.
Check for existing array keys before echoing their values.
Source code cleanup, standardization.
Check for array values before using them.
white space standardization and switched `isset` to `! empty` per feedback: https://github.com/Rarst/wporg-developer/pull/8#issuecomment-39385711
white space standardization per feedback: https://github.com/Rarst/wporg-developer/pull/8#issuecomment-39396345
Merge pull request #8 from dpellenwood/master

Basic code clean up and debug squashes