-addstr
template: ster?clnt=<name|pass>&com=addstr&str=<str>[&<rule>=pattern...]
          Order of query params is not important. Feature
          names must not end with '*' to be legal. Stereotype
          names must not be '*', '-', or empty string.
descript: A new stereotype based on the rule is inserted in the DB. The "rule" parameter is 
          a conjuction of logical operations on the demographic attribures. The form of the
          pattern is attr_name1[operator]val1|logial_operator|attr_name2[operator]val2...
	  The operator for comparison can my : for equality and >,>:.<:,<,<> for 	  
	  greater than, greater or equal than etc. We use the : and not the = symbol because of the
	  url character restrictions. The logical operations are the "or" and "and". There can be 
	  parenthesis too.
	  If there is an existing stereotype with the same name an error will be returnsd.	  
          Note that if no rule parameter exists then pserver will create an empty stereotype. If a rule 
          parameter exists pserver will find all the users that satisfies the rule and will create the stereorype
	  profile
example : ster?clnt=name|pass&com=addstr&str=educated&rule=expert.computer:yes|and|educ:3
returns : 200 OK, 401 (fail, request error), 501 (fail, server error)
200 OK  : no response body exists.