fix for #91, keep the correct query type on clones
Merge branch 'master' of github.com:tgriesser/knex

* 'master' of github.com:tgriesser/knex:
  added tests for table.charset and table.collate
  added charset() and collate() for mysql schema builder
fix for #90, multiple destroy calls are successful
adding tests for pool relating to #90
fix for #84, adding forUpdate and forShare on transactions
documentation updates for 0.4.10 release
release 0.4.10