remove automatically generated MANIFEST file
add some build artifacts to .gitignore
update tests for deterministic naming in 08ed19078
remove unnecessary getSerializedATNSegmentLimit
Merge pull request #16 from bdkearns/fixes

Fix build artifacts
Merge pull request #21 from bdkearns/fix-tests

update tests for deterministic naming in 08ed19078
Merge pull request #20 from bdkearns/fix-atn-seg

remove unnecessary getSerializedATNSegmentLimit
this should have been removed when Target became a full fledged class
Optimize construction of hash inputs