Initial parameters support & API Change

This version delivers initial support for parameters parsing as well as minor changes to API - reflecting latest vnd.apiblueprint.ast.raw+json:

• transactions key of the action object has been renamed to examples to better reflect its purpose as a transaction example
• the parameters key (and object as such) has been removed from the action object completely

Please report any disparities.

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Snow Crash: v0.5.0