Initial Pull Request from fork chaim1221

These changes reflect requests made by centers, including and most notably Casa Latina, for increased functionality. They are listed in the updated internal documentation and on the "Machete news" section of the home page, reproduced here for overview.

Changes to infrastructure not listed here include some upgrades to the target MVC 5 framework (including ASP.NET Identity), which both of us worked on; an upgrade to Entity Framework 6.0.2 with developer logging; and, the addition of a number of overrides in the JavaScript macheteUI module, specifically where automatic DataTables reloading was causing problems with the layout.

Beyond these UI changes, I really don't recommend doing much else to this version of Machete. Centers have started to suggest that it should be used for organizing or fundraising, and while it's open source and could certainly be used as a way to scaffold other projects, its original design intent was worker center dispatch. Some smaller centers have requested a faster way to dispatch work orders and a beta release of a lighter project (Machetito) might be in order to try a more streamlined user experience out on a test group. Aside from that proposal, which may or may not become the final 1.x version, this version, 1.9.1 is relatively stable and well received by the six centers that use it daily.

![image](https://f.cloud.github.com/assets/3819970/2427606/76621de8-abf9-11e3-9541-710e3eec59b5.png)