baobao trying to fix big.read.table
Merge branch 'master' of https://github.com/mirsinarm/big.data.frame

Conflicts:
	R/big.read.table.R
Merge branch 'master' of https://github.com/mirsinarm/big.data.frame
Baobao finished her testthats
Merge branch 'master' of https://github.com/mirsinarm/big.data.frame