Add milestones and add issues

[andibraeu]

please add your tasks as issues to milestones

so everyone can see progress on your project

[mariobehling]

This refers to the list here: https://github.com/fashiontec/knitapps/issues/17

[mariobehling]

@andibraeu There are already milestone 1 issues on the knitapps repository here https://github.com/fashiontec/knitapps/labels/knitweb by @sameeragunarathne . However I agree regarding the actual code development, it is better to put those issue in the respective repository.

[mariobehling]

@sameeragunarathne What is the update on adding the milestones here?