Added merge method
Added key functions

Make it easier to change the key
Fixed bugs
Added 'sort' and 'by'

Also some aggregate functions
Fixed lots of bugs and increase the version

to 0.0.3
Added the ability to deal with column names with quote
Minor change
Added all the documentation and fixed lots of bugs

Increased the version to 0.1.0
Minor changes on eql-methods.Rd
Minor changes on title for pkg.Rd
Minor changes
Fixed a typo in lm and glm

Added table cipy example in as.db.data.frame doc
Added summary method for db.obj

It just calls madlib.summary
Fixed minor bugs
Added dim for db.view and db.Rquery
Corrected a typo in pkg.Rd
Minor changes
Allow selecting number of rows

when using as.db.data.frame together with db.Rquery
Added support for as.factor in predict
Fixed bugs and added is.factor

* Fixed bug: db.existObject does not work with view

* Fixed bug: delete returns TRUE even when deletion fails

* Added cascade option in delete

* Added is.factor