Different versions of hydra head tutorial

[yvoloshin]

I noticed that there are two different versions of the tutorial for building a hydra head:

1. Dive into Hydra at https://github.com/projecthydra/hydra/wiki/Dive-into-Hydra
2. How to Get Started Building your own Hydra Application at https://github.com/projecthydra/hydra-head/wiki/How-to-Get-Started

There are significant differences between the instructions and I've been able to start the hydra-jetty only using the Dive into Hydra tutorial. I suggest either updating the tutorial in the hydra-head repository, or replacing with a link to Dive into Hydra. If this is done, then I also suggest removing the link to the hydra-head tutorial in the Duraspace wiki page under "For Developers", here: https://wiki.duraspace.org/display/hydra/Developers#Developers-ForNewandPotentialAdopters:
Let me know if you think these changes are a good idea and I'll be happy to help implement them.