FAB-3737 changelog generation

Create changelog with 0-v0.6 and v0.6-v1.0.0-alpha
add make changelog target
add scripts/changelog.sh script

Change-Id: I425faaff7b7fca856b0a12241c5f8627b3efefbb
Signed-off-by: Christopher Ferris <[email protected]>

Author: christo4ferris