MySQL Erlang client Files

Version 1.1.3 :
1. Avoid using of exceptions to make style of the client more functional.
2. Changed transaction function: it returns error record not throw exception.
3. Some refactoring and code improvement.

Version 1.1.2 :
1. Improved transaction support. Isolation level can be set by using client options record.
2. Fixed bug in test cases. (Starting testing suit on empty server issue).

Version 1.1.1 :
1. Improved algorithm of closing connection and reusing open connection in connection pool.
2. Code optimization was done for conn_server module.
3. Improved example.
4. Added a few test cases.

Version 1.1.0 :
1. Introduced new architecture of the client. Now the client is OTP application and it is 
  running a tree of supervisor to manage a datasource, a connection pools and
  a connection processes. 
2. The client now support datasource and connection pool design patterns. Multiply
  datasources can be established.
3. Connection pool implements functionality for reusing of idle connections 
  (tcp sockets) to improve speed and resource consuming efficiency.
4. Changed API: instead of my:open_connection/6 introduced my:get_connection/1.
5. A few new API functions added: 
  my:start_client/0;
  my:stop_client/0;
  my:new_datasource/1;
  my:close_datasource/1;
  my:remove_connection/1 (instead of my:quit);
  my:connection_record/1