Fix travis build

[gchp]

Travis is failing now because it can't find the termbox library. Need to update the install script to install this before running the tests.

[gchp]

The build will now install the termbox library, buts its failing halfway through the tests. No idea why. The output is not helpful.

    Running `/home/travis/build/gchp/rdit/target/rdit-b6ee4c9f1c1abf17`

running 27 tests
test cursor::tests::test_get_offset ... ok
test buffer::tests::test_get_status_text ... ok
test buffer::tests::test_split_line ... ok
test cursor::tests::test_delete_forward_char ... ok
test cursor::tests::test_delete_backward_char ... ok
test cursor::tests::test_get_line_length ... ok
test cursor::tests::test_get_position ... ok
test cursor::tests::test_insert_char ... ok
test cursor::tests::test_moving_left ... ok
test cursor::tests::test_moving_to_end_of_line_when_set ... ok
test cursor::tests::test_moving_right ... ok
test cursor::tests::test_set_offset ... ok
test cursor::tests::test_get_linenum ... ok
test cursor::tests::test_get_status_text ... ok
Process didn't exit successfully: `/home/travis/build/gchp/rdit/target/rdit-b6ee4c9f1c1abf17` (status=9)

The command "cargo test -v" exited with 101.

[gchp]

Fixed in c9ee454