remove redundant code (copied from another appliance source)
removed hostname configuration

rational:
    - performed automatically by common/conf/turnkey.d/hostname
renamed conf.d/conf -> conf.d/main (consistency)
leverage tkldev common lamp makefile and plan
moved package installation to plan
download observium tarball instead of svn checkout

rational:
    - as of Oct, observium has split the platform (OSS and subscription)
    - OSS is available as tarball, subscription is via SVN
      http://www.observium.org/wiki/Edition_Split
refactored database configuration
moved rrd and graphs directory creation to a more suitable location
created observium apache vhost configuration (incl. ssl)
refactored admin user creation (consistency)
removed core's confconsole services (overwritten by conf)
removed conf's confconsole services (we now inherit from common lamp)
removed aceshome installation
bugfix: inserting schema must be run from approot
typo: ADMIN_USER -> ADMIN_NAME
configure snmp to use observium mibs
updated observium cron to call poller-wrapper (requires python-mysqld)
added apache-credit
created inithook to set observium admin password on firstboot
updated readme (turnkey appliance readme consistency)