Add BeforeAllCheck
Add entry to README describing the before_all check
rewrite the hook in pure sh shell

the pure shell makes it a bit more readable,
but I do not expect you to merge it - it's just mine opinion
move the loading error to ruby to avoid the double ruby initialization penalty
Dropping `1.8.7` support.

It's time...
Just use `rbx`

Taken from the wise Travis maintainers themselves:

cf: https://github.com/travis-ci/travis/commit/454fb5972f85f29db71f78da2e1d57c6bd7a6546
fix the hook test
Update rake
Add `rubysl-singleton` for `Rake` on `Rubinius`.
Merge branch 'master' into patch-1
Add a choose your own template proposal.
Add some faux shell prompts to illustrate hook installation.
Updating some proposed custom hook names.
allow overriding the used ruby command in the hook, fix #97
add flag to silence the rvm path warning, fix wayneeseguin/rvm#2428
the warning is triggered by the PATH modification by git to be the first one,
adding the flag makes no effect on any other software and fixes the warning
for rvm usesrs.
Merge pull request #98 from mpapis/patch-1

rewrite the hook in pure sh shell
Version bump to 0.11.0
Release notes for v0.11.0
Merge pull request #95 from markprzepiora/master

Add a before_all check
Update changelog.md