* fix: This can be null under some circumstances

* ref: Rename Frontend to Client

* ref: ClientBase -> BaseClient

* ref: Remove client and pass options instead

* ref: Add correct type checks for raven-js send

* feat(types): Introduce @sentry/types package
* feat(types): Remove redundant package-lock.json

# Conflicts:
#	packages/browser/src/backend.ts

* ref: Move setContext to configureScope

* feat: Add fingerprint, Remove sinon/chai use jest only in shim

* feat: Bump shim api version

* ref: Code comments

* ref: Rename to ScopeInstane since Scope is reserved

* ref: Remove sinon and chai from core

* feat: Rewrite node sdk to use configureScope

* ref: Remove sinon/chai from node

* ref: Browser use configure scope

* ref: Renaming Scope/Layer/ScopeContent

* ref: Scope is now Scope, no more Content

* ref: Remove initial Scope from sdks

* ref: Convert scope into class

* ref: Move scope to correct file

* ref: Doc comments, Move scope to seperate file

* ref: Move scope into core

* ref: Core scope cleanup

# Conflicts:
#	.gitignore
#	Gruntfile.js
#	dist/plugins/angular.min.js
#	dist/plugins/angular.min.js.map
#	dist/plugins/console.js
#	dist/plugins/console.min.js
#	dist/plugins/console.min.js.map
#	dist/raven.min.js
#	dist/raven.min.js.map
#	dist/sri.json
#	karma.config.js
#	karma.integration.config.js
#	karma/karma.config.js
#	karma/karma.integration.config.js
#	package.json
#	packages/raven-js/karma/karma.config.js
#	packages/raven-js/karma/karma.integration.config.js
#	packages/raven-js/scripts/build.js
#	packages/raven-js/scripts/generate-plugin-combinations.js
#	packages/raven-js/src/utils.js
#	packages/raven-js/test/globals.js
#	src/singleton.js
#	src/utils.js
#	test/utils.test.js
#	typescript/raven-tests.ts
#	typescript/raven.d.ts