Updates to installation instructions for Virtual Machine and Docker images.
Start CDAP in the root directory.
Various additional edits.
Additional edits.
Updates per comments.
More updates per comments.
Remove extra paragraph.
Update to Docker instructions, including adding anchor for use in the Docker Image startup.
Remove instructions that are no longer applicable.
Corrected instructions and replaced errant hyphen.
Once more, into the breech.
Merge pull request #493 from caskdata/feature/r2.5.0_fix_docs_vm

Updates to installation instructions for Virtual Machine and Docker images