Updated documentation

I've updated the setup instruction and first steps section on mobile development in the Guineu documentation. Following these steps should now enable you to set up Guineu, the device emulator and create your first form. If you had difficulties to get Guineu running with the previous documentation, please give the new documentation a try.

Build 341

In a number of cases there was an exception when simply opening a table when certain field types were present. The new build fixes this issue.