Allow for anonymous sub-modules

[nikku]

Sometimes it does not matter how sub-modules are named.

In these cases, it should be possible to name sub-modules on-the-fly following simple convention over configuration.

Consider the following case

module.js:

ngDefine('some.plugin', [
  'module:some.plugin.nested:./nested'
], function(module) {
});

nested.js:

ngDefine('some.plugin.nested', function(module) {
  // module definition
});

It is required to type the nested plugin name multiple times (each in a separate file). This is cumbersome and error prone.

Using some loading magic we should be able to simplify the setup by allowing implicit sub-modules based on parent > child dependencies.

The resulting structure could look like this:

module.js:

ngDefine('some.plugin', [
  'module:./nested'
], function(module) {
});

Assumes nested AngularJS module to be named some.plugin.nested (due to module location).

nested.js:

ngDefine(function(module) {
  // module definition
});

Defines the AngularJS module some.plugin.nested as it is loaded via some.plugin > ./nested.

Checks have to be done to ensure that the module loaded is not loaded twice under different names.