Merge pull request #22 from joncave/type-splitting

Retrieve type and variable information from docblock tags
Add version support
More exact respect for the @since docblock
Merge pull request #24 from ericandrewlewis/master

Add @since support
Remove unnecessary executable permissions.
Fix use of json_decode() so arrays are passed to import_file().

When using the `import' command it is necessary to decode JSON objects
from the input file into associative arrays as this is the format
expected by the importer.