add new FiledType: MapField and AnyField to indicate map entry and interface{}

[howieyuen]

ref: #72

This PR mainly to add missing field type for template render engine, especially composite type, eg: array, map and struct.

And I also rename struct field of ProjectTemplate, make it more accurate and consistency with custom params structure.

[coveralls]

Pull Request Test Coverage Report for Build 2492575994

• 2 of 2 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.04%) to 75.693%

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Totals
Change from base Build 2485761807:	0.04%
Covered Lines:	3684
Relevant Lines:	4867

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💛 - Coveralls

[elliotxx]

lgtm