Removed unused header

Removed unused header prior to core submission. Starting extension submission.
Passed Level 7 Tests
Implemented basic search

Passes first search test
Fixed and extended search function

Fixed bug in search function that was not finding a string at the start of a line. Extended search function to loop back to start of document.
Extended search across lines

Untested
Changed the search function to string based

Rather than searching a line at a time, checking for new lines etc., this function just takes the document string and searches using built in string function.
Fixed search so it loops back to start