multi mount-point

[amitu]

Note: This can not be picked till this is implemented: #591.

We should be able to mount a fpm dependency package on more than one mount points in any package. So we can write:

-- fpm.packge: abrark.com

-- fpm.dependency: fifthly.github.io/kameri

-- fpm.mount-point: /todos/
package: fifthly.github.io/kameri
config: logo: todos.png

-- fpm.mount-point: /work/
package: fifthly.github.io/kameri
config: logo: work-todos.png

We will not allow mount-point attribute on fpm.dependency after this and only support fpm.mount-point.

Mount Options

The extra options would be passed to any document when using package-data processor.

Say fifthly.github.io/kameri/index.ftd contains:

-- string logo:
$processor$: package-data

fifthly.github.io/kameri/index.ftd is rendered when either abrark.com/todos/ and abrark.com/work/ is accessed.

When visiting abrark.com/todos/ the logo variable will be set to todos.png where as when abrark.com/work/ is rendered logo will be work-todos.png.