Merge branch 'addHiddenValleyParticles' into 'master'

Liang Sunrequested to merge
cherry-pick-44783bd1-3 into dt-2012

Add Hidden Valley particle definitions to ParticleTable.txt

See merge request !38 (merged)

(cherry picked from commit 44783bd1)

78ba3b80 Add Hidden Valley particle definitions to ParticleTable.txt

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