add boilerplate readme
udpate readme
create newSelect() etc methods, and allow a default db type on the factory
start on the readme (not done yet)
on QueryFactory object, not on connection
Merge pull request #1 from harikt/readme

Readme
update readme
finish common queries, convert to native PDO, add mysql-specific methods
add pgsql and sqlite specific methods
add sqlsrv specific methods
add sqlsrv note
add highlighting
allow for a common query object against any database, and update readme for it
db-specific abstract classes no longer needed
move traits into common, and extend common instead of using traits
indulge my ocd
consolidate buildFlags() at the common level
make where() and having() take multiple sequential arguments for ?-placeholders, instead of a single array
move common interfaces to common dir
build statement in a property; this makes overriding build*() methods a little cleaner