create prev next arg for content loop. Fix #361
filter with contentFolder table for finding next/prev content
implement addCriteriaToPositionQuery method in content model. #360
refactor content loop splitting parseResults method
Merge pull request #364 from lunika/content

create prev next arg for content loop. Fix #361
seo title field is not mandatory anymore
rediplay SEO tab after submit. Fix #352
Merge pull request #365 from lunika/seo

Change some behaviors on SEO tab