Major additions to support JSON files and provide compile time options

- Add file_json/get_file_json handling.
  This creates a new global template function to treat a file as a
  json file and returns a dict.

- Add some tools for merging dictionaries.

- Add command-line settable variables that get inserted into metadata
  tree so that at runtime options can be set.

pixywerk2/__init__.py

@@ -1 +1 @@
-__version__ = '0.3.0'
+__version__ = '0.5.0'