added mysql InnoDB fulltext search on column title and paste

-added getlastPastesSearch($search) in default.class.php
-using getlastPastesSearch($search) in last-pastes.php
-don't filter with datables on page load ( last-pastes.html)

requires mysql >= 5.6 ( for InnoDB fulltext support which allows to use
custom stopwords tables, useful when your host doesn't allow you to
restart mysql and/or change .cnf file , see :
http://stackoverflow.com/questions/12678920/ignoring-mysql-fulltext-stopwords-in-query
)
create a stopwords table in your database ( ex :
MY_INNODB_FT_DEFAULT_STOPWORD, check
http://dev.mysql.com/doc/refman/5.6/en/fulltext-stopwords.html )

=>recreate pastes table using ( replace pastebin with the name of your
db) :

select
@innodb_ft_user_stopword_table="pastebin/MY_INNODB_FT_DEFAULT_STOPWORD";
-- ----------------------------
-- Table structure for pastes
-- ----------------------------
DROP TABLE IF EXISTS `pastes`;
CREATE TABLE `pastes` (
`id` int(200) NOT NULL AUTO_INCREMENT,
`userid` int(50) NOT NULL,
`uniqueid` varchar(10) NOT NULL,
`title` varchar(30) NOT NULL DEFAULT 'Untitled',
`lang` varchar(30) NOT NULL,
`paste` longtext NOT NULL,
`date` varchar(10) NOT NULL,
`expire` varchar(30) NOT NULL,
`exposure` enum('public','private') NOT NULL,
`hits` varchar(100) NOT NULL DEFAULT '0',
PRIMARY KEY (`id`),
FULLTEXT KEY `fulltext_title_paste` (`title`,`paste`)
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=latin1;