Merge branch 'release-0.1.3' into dev-0.1.3
minor: checkpoint added.

 - checkpoint added at height=318300
 - quick build instructions added for 'dev-0.1.3' branch, which is
   currently merged up to master branch. Should be the last build coming
   from this branch, will switch to 'dev' branch soon, including latest
   bitcoin updates.
Merge branch 'dev-0.1.3' into release-0.1.3