Yichen Wang 0d75d971c7 Add the workaround for pip installation on RHEL
1. Add the workaround for pip installation on RHEL;
2. Add the missing dependencies in docs;

Change-Id: I3d5ae11721bd67f8125e8e72e093147301eaea27
2015-09-21 16:35:34 -07:00
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