documentation

Pull request #502: Feature/DEV-2273 6.4 D

Merge in WEB/documentation from feature/DEV-2273-6.4-D to release/6.4

* commit 'b9dfefa105777e11b2c70973e36c5aebd206e1e2':
  formatting fix [DEV-2273]
  formatting fix
  [DEV-2273] added more changes to the Guides
  [DEV-2273] added Linux guide, more images and some Apache guide improvements
  [DEV-2273] Better Apache guide
  better wording
  [DEV-2273] added correct Apache2 configuration instructions
  [DEV-2273] Added guide for monitoring Apache