CRM-12321 - Revert "fix minor typo civicrm_cache table"

This reverts commit 33318c7196428c8733d3ce87ca3bbc4fc45cd5da.
CRM-12321 - Revert "cache civicrm_cache table"

This reverts commit d9d00494d13ec66856526ac2426abaecf8cab257.
Merge pull request #383 from totten/revert-cache

CRM-12321 - Revert BAO_Cache changes