Add script to more easily copy the apps

[gavinr-maps]

When you checkout this repo into the /client/ directory of Experience builder developer edition, the developer can copy/paste the apps from this repo /apps folder into /server/public/apps, but developers are lazy ... should we provide a light-weight script to copy/sync these things? @gKnoll and @thollingshead have some things they have used in the past.

[thollingshead]

My method was to setup a symlink between the repo /apps and the /server/public/apps directories such that changes are synced in both directions, whether the developer is editing the files directly in a code editor or configuring the app through the builder interface.