#238: Log errors on encoding/decoding with the key name.
Merge pull request #241 from dblock/log-error-on-encoding-decoding

Log errors on encoding/decoding with the key name.
Added array mapping transformer and refactored mtl_JSONArrayTransformerWithModelClass: to use it
Whitespace fixes
Check reverseBlock is not nil
Whitespace and indentation fixes
Fix typos
End header comment sentences with a full stop.
Add test for keypath regression
Added tests for array mapping transformer
Improved test readability
Catch key path exceptions
Separated out array mapping transformer tests by reversible and non-reversible conditions
Changed description of array mapping transformer test
Header doc for arguments that must not be nil
Merge pull request #248 from dcaunt/array-mapping-transformer

[WIP] Added array mapping transformer and refactored JSON array transformer
++xcconfigs
Merge pull request #267 from MantleFramework/xcconfigs-bump

Bump xcconfigs for Xcode 5 backwards compatibility
Fix spec description
Merge pull request #266 from MantleFramework/keypath-regression

Keypath regression