mr: fix config parsing when '-c' and '-d' options are used

When '-c' and '-d' options are used simultaneously, loadconfig()
function have to be called with relative directory as argument.
Merge remote-tracking branch 'upstream'
1.20140831.2-alt1

- update to 1.20140831.2
- mr: create temporary file with '.mrconfig' suffix
- mr: fix 'bootstrap' action
- mr: fix config parsing when '-c' and '-d' options are used