HBASE-19158 First pass at a 1.2 -> 2.0 upgrade section.
HBASE-19158 First pass at a 1.2 -> 2.0 upgrade section.

Signed-off-by: Michael Stack <b26dc72d261a92c1cfd1e643717e450a84cf2122@apache.org>
Signed-off-by: Mike Drob <7d5db5eeae20c13a709f5640b51f5c63dc0a2d15@apache.org>

ndimiduk/hbase,apurtell/hbase,bijugs/hbase,francisliu/hbase,mahak/hbase,ultratendency/hbase,Apache9/hbase,ndimiduk/hbase,mahak/hbase,ultratendency/hbase,ultratendency/hbase,ChinmaySKulkarni/hbase,ChinmaySKulkarni/hbase,mahak/hbase,bijugs/hbase,mahak/hbase,Apache9/hbase,ultratendency/hbase,ndimiduk/hbase,ChinmaySKulkarni/hbase,bijugs/hbase,Eshcar/hbase,Eshcar/hbase,Eshcar/hbase,mahak/hbase,Apache9/hbase,Eshcar/hbase,ndimiduk/hbase,mahak/hbase,ultratendency/hbase,ultratendency/hbase,apurtell/hbase,Apache9/hbase,bijugs/hbase,Apache9/hbase,francisliu/hbase,Apache9/hbase,francisliu/hbase,francisliu/hbase,ndimiduk/hbase,apurtell/hbase,ChinmaySKulkarni/hbase,ChinmaySKulkarni/hbase,Apache9/hbase,ultratendency/hbase,francisliu/hbase,ChinmaySKulkarni/hbase,Eshcar/hbase,apurtell/hbase,apurtell/hbase,Apache9/hbase,bijugs/hbase,ndimiduk/hbase,Apache9/hbase,ndimiduk/hbase,apurtell/hbase,Eshcar/hbase,francisliu/hbase,francisliu/hbase,ChinmaySKulkarni/hbase,bijugs/hbase,bijugs/hbase,mahak/hbase,bijugs/hbase,mahak/hbase,ultratendency/hbase,apurtell/hbase,mahak/hbase,Eshcar/hbase,ndimiduk/hbase,Eshcar/hbase,apurtell/hbase,ChinmaySKulkarni/hbase,bijugs/hbase,apurtell/hbase,bijugs/hbase,apurtell/hbase,Eshcar/hbase,ChinmaySKulkarni/hbase,ndimiduk/hbase,ChinmaySKulkarni/hbase,francisliu/hbase,ultratendency/hbase,Apache9/hbase,ultratendency/hbase,mahak/hbase,francisliu/hbase,ndimiduk/hbase,Eshcar/hbase,francisliu/hbase