add contactType to contact

- [x] make each contact be either  "admin" or "customer"
- [x] on edit/new form have it be a basic select2 like in first example here http://ivaynberg.github.io/select2/
- [x] basic filter by contact type
- [x] add to search form with select2 , have be like the "Multi-Value Select Boxes" example from link above. so that it pops up options as soon as you click it instead of requiring to type first few characters.