Return true from GitlabPostReceive to ensure custom hooks run.

Fixes https://gitlab.com/gitlab-org/omnibus-gitlab/issues/438.

See merge request !62

Update readme after Saturday morning conversation with Dmitriy.

See merge request !61

Less if-else nesting in gitlab_shell.rb

This intention of this change is to make the normal flow of execution
easier to read, and to prevent mistakes in deeply nested if-else trees.

See merge request !60

This intention of this change is to make the normal flow of execution
easier to read, and to prevent mistakes in deeply nested if-else trees.

Expect broadcast message API endpoint to return 200 with empty JSON if
no broadcast messages available

Git annex fix

See merge request !58

Git annex disabled by default

cc @sytse

See merge request !57

Git annex support

- [x] fix auth for git-annex
- [x] enable git-annex for repository on first annex call
- [x] config option to disable it
- [x] write tests

See merge request !55

Conflicts:
	lib/gitlab_shell.rb

Log full Net::HTTP error.

See merge request !56

Show nice error message when internal API is unreachable.

Closes #27.

Error message reads "Failed to authorize your Git request: internal API unreachable".

See merge request !54