First release.
New:
* toolkit build script and global build script with common targets available
* new structure of samples directory - each sample is now a separate project
* samples can now be build from command line (`make`) or from Streams Studio
* new Tuple to Avro sample
* detailed test suite available
* improved documentation is available
* new icons
* use of updated avro library (1.8.2)
* add Consisten Region compile time checks in all operators
* improved parameter checks during operator initialization
* removed parameter `ignoreParsingError` from `TupleToAvro` operator - tuples have a fixed structure
* removed parameter `avroSchemaEmbedded` from operator `AvroToJSON` - operator expects the embedded avro schema if no schema file is configured