Fix a couple things in README.
Fix a couple things in README.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137558251

xasx/guava,google/guava,google/guava,EdwardLee03/guava,mosoft521/guava,typetools/guava,DavesMan/guava,xasx/guava,tli2/guava,berndhopp/guava,Xaerxess/guava,Xaerxess/guava,EdwardLee03/guava,tli2/guava,rgoldberg/guava,rgoldberg/guava,DavesMan/guava,mosoft521/guava,google/guava,berndhopp/guava,mosoft521/guava,typetools/guava