Create and link to new site plan form/packet

We've put building a "site plan wizard" on hold for now in favor of focusing on other things. I still had an open story for putting in a better example site plan. I decided to marry the two needs and design a print form that explains better how to make a site plan and replicates how permit counter staff explain the process in person. 

This is an MVP and will be developed with Development Services Department further. I am also user testing this PDF locally with Code for America staff who are pretending they'd like to build a new bedroom.

* The first page explains the process and requirements

![siteplan-packet-1 0](https://cloud.githubusercontent.com/assets/6456757/3622563/4c87f550-0e38-11e4-8ecd-dc9e948218b0.jpg)

* The second page is a newly-updated example site plan with more details

![siteplan-packet-1 02](https://cloud.githubusercontent.com/assets/6456757/3622567/64cdba46-0e38-11e4-86fc-a8c390d1a098.jpg)

* The third page is a blank site plan for the user to fill otu

![siteplan-packet-1 03](https://cloud.githubusercontent.com/assets/6456757/3622568/7429c340-0e38-11e4-9e7b-a994d230f06e.jpg)

* I have removed some "required fields" text from the display_summary view as this new print form is fairly comprehensive.

I will continue to update this as user testing shows what needs to be explained differently/better.