Strings can be replaced with nothing
Updated version numbers and added 2 patches:
- replace with empty string
- self-delete link
Update searchreplacedb2.php

Corrected version number in title. Fixed h2/h3 mismatch. Edited copy.
Update searchreplacedb2.php

Further comment copy changes.
Update searchreplacedb2.php

Changed version numbers in comments - as should have been targeted for version 2.2.0 as these weren't just bug fixes but adding new features.
Made usage instructions list ordered
Merge pull request #17 from bungeshea/master

Make usage instructions list ordered
Inserted else to fix rejection of the long-form --database option
Merge pull request #19 from notleigh/master

Minor fix to long option handler for --database