Make sqlmain import all CSV methods from CSVManager.

[Aathish04]

Currently, sqlmain imports the csv module and uses a custom function to parse it for rows and fields.

medict/managers/sqlmain.py

Line 16 in 2f7cec8

def parseCSV(fp): #Why can't you use CSVManager.list_od_from_csv for this?

This has already been implemented as a method in CSVManager.

medict/managers/csvmanager.py

Line 112 in b83cf79

def records_from_csv(self,datafile=None):

In order to clean up the code and reduce the amount of unnecessary imports, I have removed the function, imported CSVManager, and used method in CSVManager to replace the function.

If this is merged, it would fix #19 .