Added catalog option and parser configuration options
Moved xml_catalog project here
Updated Java version to 8, updated maven plugins
Refactored xml tools to use commons-cli
Added Checkstyle, PMD, and FindBugs to etl-xml
Adjusted namespaces to be version independent
Added checkstyle to goals in pom file
Added PMD plugin to build
Added FindBugs to parser.
Made all places to use the single UTF-8 constant
Revised ETL number literals to be more Java-like
Configuration parameter is now mandatory
Migrated logging to SLF4J
GrammarCompilerSession now uses Executor
Removed Executor-based catalog resolution
GrammarCompilerSession now uses Executor
Split configuration into blocking and generic p...
Fixed checkstyle problems