Add Filter group classes
Add NF_Filter_TrimString
Add NF_Filter_Chain
Add NF_Validate classes
Add NF_Intl
Add NF_Session
Rename 'store' property in 'cache'
NF_Intl core class
Add NF_DB_Table and NF_DB_Select classes and some NF_DB_Driver bugfixes
Add NF_MVC various classes
Add NF_Validate various classes
Ass SystemExit and other functions