Basic testing programs for sngrep.

This set of test will do some basic inputs to check sngrep screen navigation 
doesn't crash. This checks are ultra-super-basic.

- test_001 : UI testing
- test_002 : Call List testing
- test_003 : Call Flow testing
- test_004 : Call Raw testing
- test_005 : Column selection testing
- test_006 : Message diff testing
- test_007: Test vector container structures

Sample capture files has been taken from wireshark Wiki:
- https://wiki.wireshark.org/SampleCaptures