fix erase filter malfunction
having a filter condition set for the erase method caused the whole data table to be dropped.
Merge pull request #423 from eschultz/dev

Fixes to Mongo Mapper's select function for group operations:
Minor cleanup
Verify folder existence; Create if necessary
Bug fix: PHP globals passed by reference in hive() result (Issue #424)
Redux: PHP globals passed by reference in hive() result (Issue #424)
Remove remnants of buggy code
Twice redux: PHP globals passed by reference in hive() result (Issue #424)
Implement apcu backend's reset()
Thrice redux: PHP globals passed by reference in hive() result (Issue #424)
Revert to 2.x multiline behavior
Bug fix with test case: PHP globals passed by reference in hive() result (Issue #424)
Revert
Merge pull request #420 from ikkez/jig-delete-fix

[Jig Mapper] erase filter malfunction
Minor cleanup
Prevent in-place array replacement (Issue #424)
Capture full X-Forwarded-For header
Add protection against malicious scripts
Check if valid upload prior to function call
Bug fix: Unknown bcrypt constant