Updates Made to Export and Import

This latest Commit has been tested with the hospital test data and it
successfully worked as expected :) .
Export:
Added more columns names that needs to replace the ; with &
Import:
1)List of entries tables gets Imported now
2)the Serlized array in formulize notification gets updated now .
3)Using get file content instead of fget ,because fgets doesn't handle
spaces and new Lines well
4)No more I pass the file content using the session. Only File name gets
passed
5)Pushed all the columns that needs groups to be updated into one table
6)Fixed a typo  bug in updating the groups
Merge branch 'master' of https://github.com/jegelstaff/formulize