v2.0.0

Major changes:

• Remove normalizeModel task
• Change field header to head for holding page header title and page head title and meta information
• Rename model fields sourceUrl to source and source to content

Minor changes:

• Add new task ./src/tasks/template/full-bem for applying BEM templates and build static html pages
• Add new task ./src/tasks/docs/load-from-http for loading pages sources via http
• Add new task ./src/tasks/core/import-model for loading pages from ready data.json file

Fixes:

• Do not override tags
• Fix passing marked options to ./src/tasks/docs/transform-md-html task
• Save initial page order

Other:

• Remove babel transpiler. Use native es6 code. (Supported from node v4.x)
• Remove unused dependencies