Support css modules at front/server side

[PowerfulPony]

work depends on the following revisions

• Add support attribute module - vue-template-compiler
  Add support attribute module vue#4091
• Do not add a handler on the server
  Do not add a handler on the server vue-style-loader#1

[PowerfulPony]

Just due to the need to use "css modules" at SSR

These changes are possible because of @YiSiWang
#422
#331

[yyx990803]

Is there any change in this PR that is not covered / needs to be addressed in #422 ? - would it be better if we merge the two dependent PRs and then merge #422 instead?

[PowerfulPony]

+It works with SSR
+The server-bundle fall only css modules
+css modules are named according to the attribute of the module
Because styles are loaded through vue-style-loader, it is necessary to fix the fragment associated with the addition of hot.reload script vuejs/vue-style-loader#1
Cause the server to will throw an error because the browser checks

In this PR are implemented that was available in version 8, there is also support for SSR.
Important to me only anyside support css-module, since using SSR.

It is also possible to fully restore the documentation of version 8
#331

I am for the result! I try to pay attention to the problem by offering a solution
I just want to pay attention to the css-modules, in the name of the module, and ssr

[YiSiWang]

@PowerfulPony Thank you for pointing out problems with SSR. But I think it's better to drop style-loader when in SSR.

1. Faster && less code
2. No need for Do not add a handler on the server vue-style-loader#1

I've done it in #422 with test case.

[PowerfulPony]

@YiSiWang
Yes, such a solution is better
vuejs/vue#4091 Please pay attention, it is already possible to use the attribute in dev branch

[yyx990803]

In that case, closing this in favor of #422