Add regression test for issue #433
Updated RuleFunction.addContextGetters to support multiple alternatives with the same label (fixes #433)
Add regression test for #469
Fix lexerActionExecutor not being preserved when returning from a rule invocation in the lexer (fixes #469)
Properly encapsulate LexerATNConfig.lexerActionExecutor, and mark as final
Add missing @Nullable annotations
Update the runtime to build XPathLexer with ANTLR 4.2
Fix paths to online binaries in build.xml
Merge pull request #503 from sharwell/fix-469

Fix 469
Merge pull request #504 from sharwell/update-xpathlexer

Update xpathlexer
Merge pull request #501 from sharwell/fix-433

Fix 433