[travis] attempt to build both dev & rel cmakes
[cmake-modules] add CodeCoverage module
[cmake] add gcov/lcov coverage to build system
[kmseqfile] fix bug in read_seqfile w/ seqfile_ok
[test_seqfile] add test_read_seqfile

Test read_seqfile directly. Needs to test more code paths
[travis] install lcov
[test_seq] add start of test_seq.c
[test_match] bring up test coverage
[test/CML.txt] fix up test src file def in cmake
[test_seq] add tests for all of create/destroy seq
[kmseq] fix bugs in kmseq
[test/CML] use test.fastq as the benchmark test
[test_seq] add tests for seq_ok & friends
[tests.h] add test_seq tests to header