UDx Example Updates for 8.1.0

Updates and improvements to the UDx examples for Vertica 8.1.0.

Highlights:

• A framework for writing simple delimited parsers. Its design breaks the various stages of delimited parsing up into clean pieces, so that it's easy to modify this parser to handle special cases and scenarios.
  • ExampleDelimitedParser.cpp contains DelimitedParserFramework
• There were some renamings in the parser functions for consistency.
  • BasicIntegerParser_continuous became ContinuousIntegerParser, which sits alongside BasicIntegerParser (same name as before).
• Three new R example functions.

UDx Example Updates for 8.0.1

Updates and improvements to the UDx examples for Vertica 8.0.1.

Highlights:

• Cleaned-up style inconsistencies
• Added url_validator to the Python UDxs
• Created a directory for the R UDxs
• Improved coding standards for all UDxs