switch to CongoCC

release 0.4.2

Only throw BatchUpdateException for statements for read

Add ! suffix and enhance error handling

New JDBC option to support INFILE and OUTFILE

Centralized configuration for JDBC driver

improve error handling when missing lib

check database existence when changing catalog/schema

Change catalog/schema in JDBC driver for USE statement

Fix class not found issue when using default JDBC jar

TCL support

new JDBC option to exclude external databases from metadata

new option for catalog support

Repsect node-specific credentials

Fix transaction failure since 0.4.0 and enable more tests