Merge pull request #185 from reem-utils/chang_branch

Chang branch
Added a node to track a person from the face detection using tf to really transform the position of the detected face
Merge branch 'master' of https://github.com/reem-utils/robocup2014
Some fixes like 0.0 in Z
Update of grammar. New sentence added
Merge pull request #186 from reem-utils/cris_branch

Update of grammar. New sentence added
follow me init, it take a id of the person who have in front
Merge pull request #187 from reem-utils/roger_branch

follow me init, it take a id of the person who have in front
Made necessary changes to compute correct orientation
Merge branch 'master' of https://github.com/reem-utils/robocup2014
Last minute changes to make it work
UPdating parser_grammar.py and New Check_dic_gram.py