Undoing work from CLC-2576. Revert "CLC-2576 Configurable memcached/memory store choice"

This reverts commit 62e1bc18ba1dda3c650f8fa328994dcc0e1ff79d.
Undoing work from CLC-2576. Revert "CLC-2576 Update documentation"

This reverts commit 50d0cfee1eb71bf4249658217a292d75e0a87ac0.

Conflicts:

	README.md
Undoing work from CLC-2576. Revert "CLC-2576 Fix test failures"

This reverts commit d729ef80bf0a20f631fa066a51250d11e9fe0f20.
Merge pull request #1698 from ctweney/clc-2702

CLC-2702 App is using file-based cache instead of memcached