Fix #284: Remove var currentCUnit in GenJSCode
Fix #287: Remove reflective call proxies for default param methods
Fix #285: Make @JSName work for getters and setters
Merge pull request #289 from gzm0/minor-fixes

Minor fixes
Comment behavior/rationale of check-partest-coverage.sh
Merge pull request #291 from gzm0/comment-partest-coverage

Comment behavior/rationale of check-partest-coverage.sh