add .travis.yml to see why testers fails jvm

See JVM failures at testers.perl6.org
Test alternative hash key lookup for JVM compat
.exists_key
s11 meta.info
Try something else
Try ~ on int hash keys
Update readme to reflect boolean $binary vs int
IO::Handle instead of Handle
Merge branch 'master' of https://github.com/ugexe/perl6-csv-parser into ugexe-master

Conflicts:
	META.info
Merge branch 'ugexe-master'