delete also files in ~/.bbbike/cache
data update (mainly new temporary blockings)
data/Makefile: use .WAIT instead of .ORDER

This hopefully allows more granular order constraints.
use .WAIT also in Makefile.mapfiles
data update (mainly temp blockings)
Merge remote-tracking branch 'eserte/master' into world
Merge branch 'world' of ssh://git.bbbike.org/home/git/bbbike into world