Assembly instructions

[daprice]

The web app should probably have downloadable hand assembly manuals. Possibly as an additional button next to Preview and Generate STL that would go to the manual for the hand that's selected in the interface. Or just a link to each hand's guide under Help.

This could just be a link to the enablingthefuture.org page for the hand or it could have the assembly guide stored in Markdown or something to make it easier to keep track of in version control along with the hand itself.

[laird]

We added a link to the web site page that links to all of the designs and their instructions as a first step.

Ideally we should recognize the selected model and options, and link to the relevant assembly instructions.

This can be added to Assembly.scad, provided by a log line.

[laird]

Added link into email sent to users.