Remove todo from readme, since its in GH issues
Fix data races in test suite

This fixes the data races in the test suite, when ran with `go test
-race`.

The new behaviour is the same and fzz works the same. The fix also
removed the wrong behaviour of `return`ing to early and not resetting
the printer when a command failes with an error.
Fix data race by not removing shared access to input slice
Bring back the Printer mutex

This reverts commit dbba735421401c4751a1cf8c5eb29ef666ca6679.
Avoid reading incomplete utf8 sequences
Merge pull request #11 from ebfe/scan-runes

Avoid reading incomplete utf8 sequences [fixes #9]
Use master branch for Travis badge
Add note about contributing to README
First stab at a main loop
Wait for command to finish when exiting
Make Ctrl-D with long running commands work
New runner per command run, waitgroups

No data race, except a really rare race:

==================
WARNING: DATA RACE
Read by goroutine 73:
  os/exec.(*Cmd).Wait()
      /usr/local/go/src/pkg/os/exec/exec.go:307 +0x11e
  main.(*Runner).Wait()
      fzz/runner.go:96 +0x89
  main.(*Runner).KillWait()
      fzz/runner.go:89 +0x8c
  main.func·002()
      fzz/fzz.go:149 +0x145

Previous write by goroutine 72:
  os/exec.(*Cmd).Wait()
      /usr/local/go/src/pkg/os/exec/exec.go:310 +0x1ed
  main.(*Runner).Wait()
      fzz/runner.go:96 +0x89
  main.(*Runner).KillWait()
      fzz/runner.go:89 +0x8c
  main.func·002()
      fzz/fzz.go:149 +0x145

Goroutine 73 (running) created at:
  main.mainLoop()
      fzz/fzz.go:151 +0xa11
  main.main()
      fzz/fzz.go:237 +0xdfa

Goroutine 72 (finished) created at:
  main.mainLoop()
      fzz/fzz.go:151 +0xa11
  main.main()
      fzz/fzz.go:237 +0xdfa
==================
Found 1 data race(s)
Remove useless line, print errors with Printer
Use stdinbuffer for new runners again
Remove debugging via trace.log
Declare stdoutbuf as pointer
Do not write stderr to stdoutbuffer
Use one goroutine for printing stdout and stderr
Remove now unneeded select statement
Remove or fix runner tests