Fix API doc parameters and documentation (Angular specific, and others)

[alex3683]

There are some parameters still containing "scope" (for example registerFlagFromFeature in the flag handler). This must be changed into something universal, for example "context".

[x1B]

Renamed issue, let's include non-Angular-related API doc cleanup work as well.

[alex3683]

• [x] @memberOf => @memberof
• [x] remove @private docs
• [x] $scope => context (AxContext presumably) and probably as first:
• [x] add laxar-dox for api doc generation, including the npm script in package.json
• [x] add missing module description for laxar-patterns.js
• [x] Last but not least: Check api doc for correctness with regard to contents

[alex3683]

Breaking:

• flags: scopeKey => contextKey

[alex3683]

Implemented on master (v2.0.0)

Breaking Change

Since LaxarJS is independent from AngularJS starting with 2.x all occurrences of scope (which referenced the AngularJS widget scope) are renamed to context (generic AxContext instance provided by the widget runtime). The latter is agnostic of any widget implementation technology. In fact for AngularJS the scope extends the AxContext instance. For the flags library not only the documentation needed to be changed, but also the scopeKey option of registerFlag and registerFlagFromFeature. So this

flags.handlerFor( context )
   .registerFlagFromFeature( 'superFeature.superAttribute.disableOn', {
        scopeKey: 'flags.disabled',
   } );

becomes this

flags.handlerFor( context )
   .registerFlagFromFeature( 'superFeature.superAttribute.disableOn', {
        contextKey: 'flags.disabled',
   } );

The same applies to registerFlag.