This needs lcov installed, but it's a good quick helper for local
runs. For history and pull requests, codecov keeps tracking.
Also tweak in the process gitignore to clean the noise.
Short of moving to autotools, this is the best that can be done:
- move the version from hardcoded in the .c files, to a
dynamically-built `version.h` file so that we only declare the
version in one place
- build a better dist file (.tar.gz) by explicitly selecting which
files to copy, instead of unbounded recursion from the source
directory
- ensure that the files being copied to the archive have a sane
user/group and mode
- add a distcheck target that simply reuses the archive to build and
run the programs, and then regenerate the archive from itself
autotools would solve all this by default, but still feels too
heavyweight for just two .c files.
Additionall, drop the .lsm file. It seems mostly useless these days;
I'll be happy to reinstate it however if anyone cares.
