Fix a bug on Composer.

When resolving `hoa://Library/…`, the `_reach` attribute was
overwritten, which was an error. This is fixed now.
`hoa core:welcome` works on Composer.
Merge branch 'incoming'
[auto] Merge from Core

    • #1e30b34 — Fix a bug on Composer. (Ivan Enderlin, 2014-01-25)
    • #671494d — `hoa core:welcome` works on Composer. (Ivan Enderlin, 2014-01-25)
    • #07c3c07 — Merge branch 'incoming' (Ivan Enderlin, 2014-01-25)

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Merge branch 'master' of /var/lib/git/repositories/Library/Core