rearrange queries, updating test documentation and add sequel model queries test spec
adding first select method to allow to select a single row record from database
updating documentation for select first
update documentation
add sequel model joins api
initial update , insert , destroy queries
implement simple destroy, insert and update for sequel model
initial aggregate queries implementation
update model registry function to check if model already exist
updating count aggregate query
re-arrange test specs
updating minimum and maximum squel model queries and their test
adding bluebird for promises
initial aggregate queries test
update insert and update queries and their test spec