Merge new InnoDB into MariaDB 10.0

Monty is to start the merge of InnoDB into MariaDB 10.0.

Note that there is 5.6.5 m8 (http://dev.mysql.com/downloads/mysql/5.6.html) currently available as well as the spring labs release code-named G5 I guess that differs from what is available in 5.6.5 m8 (http://blogs.innodb.com/wp/2012/04/innodb-2012-spring-labs-release/). There are some features in the labs release that aren't in 5.6.5 m8 (like online DDL, more scalability improvements, etc - see the linked blog post). There is source (http://labs.mysql.com/) but maybe no public tree