author filter changes

author filter changes
Merge pull request #7 from DiliBau/master

author filter changes
Merge pull request #6 from marianflorin/master

#4592 - changed spanish words to english in blog
reverted a change from the author backend

reverted a change from the author backend
Merge pull request #8 from DiliBau/master

reverted a change from the author backend
made it so that admin forms can validate

made it so that admin forms can validate
Merge pull request #9 from DiliBau/master

made it so that admin forms can validate
added cache control headers to the Blog Post pages