Merge pull request #2 from nukeviet/develop

Format code.
Add PHP Data Objects
Remover MySQL Functions
optimize code for PDO
Merge pull request #62 from vuthao/develop

Develop
update CKEditor 4.3.1
optimize code for PDO
Merge pull request #64 from vuthao/develop

Develop
optimize code for PDO
Merge pull request #65 from vuthao/develop

optimize code for PDO
Merge pull request #1 from nukeviet/develop

update
remove "`" in sql
Merge pull request #3 from PhamQuocTien132/develop

Develop
optimize code for PHP
remove "AS" in sql JOIN syntaxes for the table
change UNIX_TIMESTAMP by NV_CURRENTTIME in SQL
optimize structure for table database
Remover "NULL" in sql insert with Primary AUTO_INCREMENT
Remove LITMIT 1 in SQL
Merge pull request #66 from PhamQuocTien132/develop

Develop