Structure Release

BREAKING

• remove support for node 4
• #117 - all source files moved to new src folder
• #118 - nitro view properties moved to new _nitro node (_nitro.minified, _nitro.offline, ... )
• #119 - tests in test not spec

Generator

• [security] node security check added

Nitro

• [feature] license check added
• #114 - visual regression test example added
• added a place for development files (src/proto)
• [security] node security check added

... and some other fixes and improvements: milestone, 2.1.2...3.0.0