Fix NOTICE: undefined offset: 1

Fixed the PHP notice: undefined offset: 1 in the explode by using array_pad. 
Add 12-hour time support
Updated to reflect addition of 12-hour time.
Converted to Markdown for easier reading.
Update README.md
Update README.md
Update to Markdown
Update README.md
Added syntax highlighting
Update README.md
Added Formatted airDate
Updated to include formattedAirDate
Changed case to fit with project.

Changed line 163 "DATE" and "STRTOTIME" to lowercase to match existing style.
Updated PHPDoc @author statement
Merge pull request #1 from kkirsche/master

Fix PHP Notice: Undefined Offset: 1