Make documentation comments PEAR compliant
PMA_usort_comparison_callback --> PMA_usortComparisonCallback
PMA_is_system_schema --> PMA_isSystemSchema
Align documentation comments
Fix line exceeding 80 characters
Indent parameters correctly
Opening curly braces of the function should not be in a separate line
Align function parameters correctly
Add documentation comments to the methods of PMA_Index_Column class
Merge pull request #371 from kasunchathuranga/PEARCompliance

PEAR compliance