Merge pull request #4 from drewm1980/master

Add tup support to build-shootout
Improve the error messages when something changes
#3, don't delete the .tup files, so the build proceeds properly
Move the build status up, save page space
Merge branch 'master' of github.com:ndmitchell/build-shootout
Make tup work on Windows, by getting the right /dev/null
Ignore files marked .broken
Change the spaces example to be marked .broken
Fix the include example - no need to specify the makefile
Improve the tup running, call init first and set warnings to off
Delete an excessive newline
Beef up the number of retries
Add tup to the travis script
More work on getting travis going
Merge branch 'master' of github.com:ndmitchell/build-shootout
Make Main.hs runnable
Try explicitly declaring inputs for parallel-tup