Removed net.bytes.rx and net.bytes.tx cause doubled by metric net.received and net.transmitted
Normalized colors and added 0 HRULE to all graphs with negative values.

VMware 5 graphs added:
- Memory swap graphs with negative graph for swapped out
- Network bandwidth graph added for Host-System and each NIC
- Network packet statistics added
- Network unknown protocol frames graph added
- Storage Path Number Read/Write
- Storage Path Commands
- Storage Path Latency (Kernel + Device)
- Average Read/Write Requests per Second
- Virtual Disk Number of Read/Write Commands
- Virtual Disk Transfer Rate
- Virtual Disk Workload Metric
- Virtual Disk Outstanding Requests
- Virtual Disk Total Latency (Kernel + Device)