Bug 1029992, Improve AlgorithmIdentifier decoding in mozilla::pkix, r=cviecco

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extra : rebase_source : dec7d3e00afe3a9e433f789baf09c0c41679b0e2
extra : histedit_source : 47657cfde7a266b5d5322b024800abe316e9dbd6
Bug 1029364: Centralize version parsing in BackCert::Init, r=cviecco

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extra : rebase_source : 7e91710ed7cd6e68875c2d26f0b503835968e1f2
extra : histedit_source : e07446cad5edbf6cbb048304bc2b2af4395410db
Bug 1029341: Factor out decoding of certificate/OCSP extensions, r=keeler

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extra : rebase_source : a1d66b75838e9dfad486f5654db6d977e5c1d97a
extra : histedit_source : 34e05d8b3d94500b9cb4f1e311f8fe526b97ba6e