Thrift: Cleaned up whitespace.

Thrift: Cleaned up whitespace.

Summary:
Replaced a lot of tabs with spaces in the thrift codebase.
Removed a lot of trailing whitespace from thrift-generated c++.
Added a few things to cleanup.sh.

Trac Bug: #

Blame Rev:

Reviewed By: mcslee

Test Plan:
Recompiled thrift.
Re-thrifted some test .thrifts.
Compiled the genrated c++.
Ran cleanup.sh.

Revert Plan: ok

Notes:

EImportant:

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665176 13f79535-47bb-0310-9956-ffa450edef68