Transfer all read request to Slave in Master-Slave MySQL
this is called  Read/Write Splitting

MySQL itselft have no ablity to meed your demand, 

but MySQL officially release a simple program called MySQL Proxy, 
which will help you to archive your goal and more.
however it has lots of limitations, such as doesn't support procedure, etc. 
and are offically NOT recommended to use in production environment.

Many companies create their own middleware and some are open sourced,
but as those middlewares are customized by their own scenario, it's actually not easy to use 
in other enviroment. so my advice is ,according to your business, write your own middleware.

hope that useful!



added 2014-6-26 7:31 GMT

you probably could consider some other high availability solution such as :

Galera Cluster 

Multi-Master Replication Manager for MySQL(a.k.a MMM)

they will partially meet your request, which means write/read on master node, read on several slave nodes

note that if you use MySQL Replication and read from the slave side, you probably read data slower than master side particularly there are heaviy wirte on master side, because hundreds of thousands of threads are writen simultaneously, while only one slave I/O thread propagate data to slave node.