Limit index key length when creating oembed caches
update search controller + serch.js so that autocomplete works

Added search_controller_spec, moved some tests from people_controller_spec to search_controller_spec

Fixed merged conflict in Changelog

update routes and search controller

remove useless except from search controller

Fix indentation in search_controller
Add schema changes to migration fix
Issue #4124 Check write access before authorizing Twitter
Refactor the left bar side menu, improve tag autosuggestion design, close #4271
Merge pull request #4355 from Flaburgan/resize-preview-button

Resize preview button
Merge pull request #4316 from Flaburgan/feature/4271-refactor-left-side-bar

Feature/4271 refactor left side bar
auto expand post preview
Merge pull request #4337 from oliverbarnes/4312-index-key-too-long

Limit index key length when creating oembed caches

Conflicts:
	db/schema.rb
Merge pull request #4348 from svbergerem/4346-post-preview-auto-expand

auto expand post preview

Conflicts:
	Changelog.md
Merge pull request #4344 from oliverbarnes/4124-check-twitter-write-access-before-auth

Issue #4124 Check write access before authorizing Twitter
Merge pull request #4354 from Flaburgan/improve-mobile-view

Improve mobile usability

Conflicts:
	Changelog.md
Merge pull request #4335 from Team-D/feature/4169-tag_search_autocomplete

#4169 tag search autocomplete
Valid meta elements, add pod personalization