0.4.0

CHANGES:

• Fix dependencies (#14, @Sudha247)
• Improve JSON output produced by olly gc-stats (#13, @punchagan)
• Mention Fuchsia format in the README (#11, @Sudha247)
• Gc subcommand (#10, @Sudha247)
• Add Fuchsia Trace Format output to olly (#6, @tomjridge)
• Added --output option to redirect olly printing (#5, @ElectreAAS)
• Added json printing option (#4, @ElectreAAS)