Initial SFF (Small Form Factor) Module.

This is a very rough WIP. It is a being separated and refactored
from previous production code into a more consumable format for ONLP.
Merge pull request #1 from capveg/master

Slight mod to README
Merge branch 'master' of github.com:opennetworklinux/ONLP
The SFP post-insert handler now takes the sff_info_t structure for the SFP.
Subdirectory processing.
Add onlp_sysi_platform_manage() interface.
Floating point values will no longer be used for temperature and power readings.
All values will be standardized as integers in thousandths of a unit:
- Temperature in millicelsius
- Voltage in millivolts
- Current in milliamps
- Power in milliwatts.

The floating-point members will be removed after all platform code is ported.
Merge pull request #2 from capveg/master

Added explicit LICENSE file