spec repository: suppress deprecation warnings by rspec 2.99
spec glossary: suppress deprecation warnings by rspec 2.99
spec command: remove :all into before

Because following error generates with rspec 3.1:

```log
let declaration `logaling_config` accessed in a `before(:context)` hook
at:
```
spec repository: use allow(obj).to syntax
spec: migrate rspec3's expect syntax

Yes, transpec! :)
Merge pull request #97 from cosmo0920/migrate-rspec-2-to-3

Migrate rspec 2 to 3