fabric: Add version to fi_getinfo

Update fi_getinfo to accept a version number (major, minor).  The
version data is used to indicate what data structures an application
and/or provider will use.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Merge branch 'dev'
Merge pull request #59 from shefty/master

Add version to fi_getinfo