feature(loading): loading enhancements + re-haul to use material modules. (closes #255) (closes #84)

[emoralesb05]

Description

Code re-haul of loading.module for enhancements and better usage + unit tests + better demos.
#255
#84

What's included?

• feature(animations): Added tdFadeInOut animation and used it instead of tdFade directive.
• feature(loading): Easier fullscreen loading creation + default fullscreen mask.
• feature(loading): Better efficiency with OnPush strategy.
• Deprecate ILoadingOptions in favor of ITdLoadingConfig
• Deprecate createOverlayComponent() method from TdDialogService in favor of create()
• Deprecate loadingType and loadingMode in favor of tdLoadingType and tdLoadingMode so the inputs can be used correctly in (*) syntax. e.g. *tdLoading="'name'; type:'linear'"
• refactor(loading): Leverage TemplatePortal and Overlay from material.
• refactor(loading): separated code into creation (factory) and execution (service), and made TdLoadingFactory for internal usage only.
• feature(loading): Added tdLoadingStrategy to change between overlay and replace strat. [Feature Request] Loading Overlay Component Target #84
• feature(loading): Added tdLoadingColor input for primary , accent or warn color="primary" is hard coded in td-loading component #255
• internal(loading): Better error messages.
• internal(loading): More code blocks in methods.
• docs(loading): Better demo and examples.
• code-health(loading): unit tests for TdLoadingDirective and TdLoadingService

Test Steps

• ng serve
• go to http://localhost:4200/#/components/loading and see new demo and examples.
• npm run tslint
• npm test and see code coverage now.
• npm run build

Before unit tests:

After unit tests:

Screenshots or link to CodePen/Plunker/JSfiddle

[coveralls]

Coverage decreased (-1.1%) to 69.945% when pulling 4486fbf on feature/loading-enhancements into e382f16 on develop.

[coveralls]

Coverage increased (+6.2%) to 77.275% when pulling af098ab on feature/loading-enhancements into e382f16 on develop.

[kyleledbetter]

It would be nice if:

• the top demo had some loader running by default
• the Register buttons read Toggle Loader

is the breaking change: Renamed ILoadingOptions into ITdLoadingConfig absolutely necessary? :)

[coveralls]

Coverage increased (+6.2%) to 77.275% when pulling 8a72478 on feature/loading-enhancements into 9499741 on develop.

[coveralls]

Coverage increased (+6.2%) to 77.275% when pulling d6e83d0 on feature/loading-enhancements into 9499741 on develop.