Add the installation section.
Drop PHP5.3.
[auto] Merge from String

    • #c992619 — Add the installation section. (Ivan Enderlin, 2014-09-17)
    • #506d637 — Drop PHP5.3. (Ivan Enderlin, 2014-09-17)

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