Improve documentation

[d2s]

docs(README.md) update details

• Fix details about minimum Node.js versions required.
• Fix capitalization of tool names (SASS --> Sass).
• Improve structure of English language sentences.
• Run gulp dev:doc to update Table of Contents.
• Improve Markdown syntax to fix markdownlint warnings:
  • MD022/blanks-around-headers: Headers should be surrounded by blank lines
  • MD009/no-trailing-spaces: Trailing spaces [Expected: 0; Actual: 2]
  • MD031/blanks-around-fences: Fenced code blocks should be surrounded by blank lines
  • MD032/blanks-around-lists: Lists should be surrounded by blank lines
  • MD004/ul-style: Unordered list style [Expected: dash; Actual: asterisk]
  • MD040/fenced-code-language: Fenced code blocks should have a language specified
  • MD034/no-bare-urls: Bare URL used
  • MD012/no-multiple-blanks: Multiple consecutive blank lines [Expected: 1; Actual: 2]

docs(DEVELOPMENT.md) update details

• Improve consistency of the Markdown syntax
• Improve Markdown syntax to fix markdownlint warnings
• Fix heading hierarchy (for more consistent document structure)
• Fix part deploy command (it was missin gulp)
• Fix capitalization of names
• Add missing link to the JSCS website.
• Add link to the JavaScript coding convention

[varya]

Thank you, Daniel :-)

[varya]

Hi. Your contribution has become a part of 2.1.0 release. Thank you!