warning msg tweaks
streamline the check for sas7bdat files
add teaConnect fn to open an on-disk db
Small imputation speedups
Merge branch 'master' of github.com:rodri363/tea

Conflicts:
	c/discrete/bridge.c
move SQL checks to their own fn
Add tests for checkBounds (don't work yet)
Basic discrete tests pass
add edit_grid_to_list
One real-valued consistency check passes tests
Fix bug that parses / as plain text
Multiple real-valued consistency checks pass tests
Merge branch 'master' of github.com:rodri363/tea
Revert "README.md modified installation instructions"

This reverts commit 9708d5d4ae7a739c2fe2954c6e7a1ac3bee5c935.

Conflicts:
	README.md
Fix bug inserted by edit fixes re edit_grid
Merge branch 'master' of github.com:rodri363/tea