Merge pull request #20 from fabianvf/master

Elastic search is working (?)
Fix elastic search and timezone roles
Fix gitignore
Replace Ansibles.hostname with a simpler hostname role
Update requirements
Prevent key error in csf role
Add genpass task
Add back groupvars
Adds public keys for users
Merge pull request #27 from lyndsysimon/feature/keys

Adds public keys for users
Use hidden password input h/t @lyndsysimon
Merge branch 'master' of https://github.com/CenterForOpenScience/cos-ansible-base
Clean up and update readme
Update readme
Run rkhunter on first run
Add instruction for generating password
Change elasticsearch passwords
Fix vagrant provisioning commands
For now, just copy pubkeys in group_vars

"lookup" function doesn't seem to be working
Add network interfaces role