Install patched bisect
check SHA1 of tarball
coveralls support
don't build everything before bisect is available
install bisect before running ocp-build
typo
use system dir for bisect
.opam dir
typo
coveralls badge
bisect_SRC_DIR
Merge branch 'cover'

Closes #15

* cover:
  bisect_SRC_DIR
  coveralls badge
  typo
  .opam dir
  use system dir for bisect
  typo
  install bisect before running ocp-build
  don't build everything before bisect is available
  coveralls support
  check SHA1 of tarball
  Install patched bisect