Rename author 'Gary Yohe' to 'Gary W. Yohe'

This author is listed as 'Gary W. Yohe' in AR5 WGII chapters
and 'Gary Yohe' in the appendix.

He also participated in AR3 and AR4 within the same institution.
Rename author 'Guy Midgley' to 'Guy F. Midgley'

This author is listed as 'Guy Midgley' in AR4 WGII SPM,
'Guy F. Midgley' in AR4 WGII Ch4 and AR5.