Added field mapping stack implementation
Added capability to control this feature using standard
DefaultMapperFactory.Builder or system properties mechanism.
The feature is disabled by default.
Merge pull request #32 from orika-mapper/qualified-field-context

Qualified field context
Added null check for MappingContext constructed with 'null' for
globalProperties
Updated sourceCodeContex to include src/dest in generated code.
Applied same multi-occurrence mapping behavior for arrays as is used for
collections (and corrected possible stackoverflow in the process)
Added test to prove that fieldContext can be used with filters; added
fix to source code generation to reorder field context capture before
applying filters
Merge branch 'master' of local repository into add-dest-to-filter.shouldMap