Add plt_include_all_deps dialyzer option

[sile]

According to #778, I tried to add plt_include_all_deps dialyzer option.

%% in rebar.config
{dialyzer, [
    {plt_include_all_deps, true}
]}.

If the value is true, dialyzer will include not only the first level dependencies but also all nested dependent applications in the PLT file.

[fishcakez]

We should error if an app doesn't exist. The application can't be started if a dependency does not exist.

[sile]

You're right.
I will fix these error handlings.

[sile]

I fixed the code.
Please take another look.

[tsloughter]

@fishcakez @ferd is this good to merge now?

[fishcakez]

👍 from me.

[ferd]

merged and updated the docs: http://www.rebar3.org/v3.0/docs/configuration#dialyzer -- this needs to be made friendlier but oh well.

[sile]

Thank you!