Small Bugfixes

Code Maintenance: General improvements for the cbplotgen.R utility.
Code Maintenance: Now all files produced by monextract use relative time. The beginning of the experiment is marked as the first moment when a command was detected in the trace file (this will make running multiple experiments in the same file impossible for now - will fix it later).
Bugfix: Redis startup on VMs with redis-server vesion 2.4.X now works properly.
Bugfix: NTP service startup works on both RedHat and Ubuntu VMs.
Bugfix: Configure was incorrectly considering "netcat" utility absent when executed on RHEL nodes.
Bugfix: Executing CB as root on RHEL resulted in failure while extracting CSV files.
Bugfix: vmcdetach all was failing while trying kill the HOST runtime OS metrics collector(gmetad.py).
Merge branch 'master' of github.com:ibmcb/cbtool

Conflicts:
	.gitignore