parameter keys of grains now consistent with pillars
update pillar.example
added provisioning for the accumulo native map lib
Merge pull request #8 from vhgroup/master

zookeeper-service is the right name.
refactored parameter names and locations - please see pillar.example
moved pillar calls out of accumulo-site template
pull namenode_host directly from hadoop.settings
default_memory_profile missing from accumulo dict.