always assign post__not_in into criteria so 295 doesn't error
Merge pull request #39 from zbtirrell/master

always assign post__not_in into criteria so 295 doesn't error
my last fix wasn't good enough
Merge pull request #40 from zbtirrell/master

my last fix wasn't good enough
fixed a variable name (and php warning)
Merge pull request #41 from wluo/php-warnings

fixed a variable name (and php warning)
version and readme updates
Image optimization backport