Added ability to define custom clauses, updated tests
updated readme
updated readme
Merge branch 'master' of github.com:rpoole/node-persist

Conflicts:
	README.md
define clauses differently
readme
allow arguments passed through the custom chains
readme
readme
fixed bug with anonymous functions, updated readme
finazlied how clauses are defined, updated readme and tests
Merge branch 'master' of github.com:rpoole/node-persist
Merge pull request #84 from rpoole/master

Add support for custom clauses