convco check --from-stdin should not need a .git repository

[jbergstroem]

When invoking check by passing a commit from stdin I don't think a .git repository should be required. Not sure if a bug or intended feature.

$ echo "whatever: Test" | convco check --from-stdin
Error: could not find repository from '.'; class=Repository (6); code=NotFound (-3)

Refs: #53.

[jbergstroem]

Thanks for working on this! I just tried compiling the latest head (60279b8) and the git warning still seems to be around (but the check still works!):

$ git status
fatal: not a git repository (or any of the parent directories): .git
$ echo 'foo: bar' | convco/target/debug/convco check --from-stdin
could not find repository from '.'; class=Repository (6); code=NotFound (-3)
FAIL  -  wrong type: foo  foo: bar

[hdevalke]

Yes, the error is still printed out for information. However, the commit will be checked and the command will exit with a non zero status in case the stdin message is invalid.