Correct typo
Merge pull request #2888 from aanbar/develop

Fixed variable scope.
Merge pull request #2889 from noskov/develop

Correct typo for directory helper docs
Don't load password hashing compat for HHVM
Moved $_error load statement lower.

This prevents a possible recursion when an error is trigerred by one of the config file.
Also since the variable is used only later in the code it makes sense to move it lower.
Merge pull request #2891 from cristik/develop

Moved $_error load statement lower.
Fixed typos in Migration library documentation

Signed-off-by: Jacob Tabak <Jacob.Tabak@HelloWorld.com>
Merge pull request #2892 from jacobtabak/develop

Fixed typos in Migration library documentation
Add compatibility layer for array_column(), array_replace(), array_replace_recursive()