Fix typo in stats computation
Fix intellij warnings
Support scalar functions with @Nullable arguments
Allow binding multiple event clients
Merge Operator infomation
Update airbase with new joda-time
Fix TimeZoneKey tests after updating index file
Fix S3 max connections config

Previously, it was always using the default.
Multipart upload support for PrestoS3FileSystem
Configure AmazonS3Client SOCKET_TIMEOUT
Move S3 fields together
Make testDuplicateFunctions more robust
Add parameteric types and functions

* Add support for parameteric types and functions.
* Add ARRAY as a parametric type
* Add subscript operator as a parametric function that operates on any ARRAY type
* Add new syntax for ARRAY constructor (i.e. ARRAY[1,2,3])