Too much stack allocation

jbofihe was crashing on stack ulimits when run with -H. These variables
all seem to be used to store only single words, so changing them back should be OK.

char array size fix

• made many char[] arrays larger; see
  #13 for why. This was
  done without any attempt to understand the code, so please report
  any problems.
• cleaned up some gcc warnings

Release 0.41

Dockerized the build.

Moved find_loj.pl out of the rock it was hiding under and into this repo, along with significant cleanup of it.