reverted to branch for development

put it back to 0.1.2 state plus fatmedia's title fix to branch a development version for testing new features.
synced readme.txt with svn 0.1.2

Added screenshots
added 0.1.3 changelog entry
added image fallback for 0.1.3 update

Fallback to featured image if no banner image selected yet.
Merge pull request #15 from pmgllc/development-jpetersen

version 0.1.3 ready
updated stable tag to 0.1.3
updated version number to 0.1.3
Updated tested version to 3.5.1
Merge pull request #4 from pmgllc/master

Catch up to master