Fix build & deploy, restore changes

[kremalicious]

• reverts commit 7c110417aee9f83866c235aec90f24df850bab2d to restore changes in master
• properly remove all redundant pages: newsletter, services
• properly remove all js & forms for: newsletter, contact, services
• run with default Jekyll markdown parsing options, fix all code examples for it
• remove meetup & blog fetching
• update all dependencies
• closes #308

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