Speed up windows build.
[RPC] Fix integer type conversion when returning task object.
Update version to 6.0.1.
Update versions to 6.0.0
Improved file checkout procedure.
Fix upgrade script issue.
[client] Update version to 5.1.4.
Merge pull request haiwen#1717 from haiwen/deb-qt5 Revert "Require qt 5.5+ in deb packages."
[client] Update version to 5.1.2.