See #83 - use assembly

Use maven-assembly plugin to generate zip for distribution of ui parts.
Added dependency in srv on this ui part instead of the relative path.
See #83 - updated with forgotten files

* removed `assembly.xml`as it is now provided by io.restx:restx-maven-assemblies
* added `war-overlay-resources.xml` to SCM
* fixed typo in fragment used
* updated io.restx:restx-maven-assemblies version to the first released one `1.0`
Merge pull request #95 from CedricGatay/RESTX-83

[shell] [app new] use assembly and war overlays when using srv/ui layout (Fixes #83)