implement count for PDO MySQL
improve sphinx filters to support AND|NOT and flat groups
add suggest for sphinx-api package into composer
Add grouping option to rekey data format
Merge pull request #22 from satan85/master

Add grouping option to rekey data format
setOrder fix
Merge pull request #23 from yudina-m/develop

Sphinx setOrder fix
sphinx complex logic filters test
Merge pull request #24 from Serjick/sphinx

Sphinx filters
Add group data format to PDO Arr
Fix NL
Merge pull request #25 from satan85/master

Add group data format to PDO Arr
implement count_total for PDO MySQL
remove not used method
Merge pull request #26 from Serjick/pdo

PDO counts