Check if describetypejson is a better alternative to describetype

[benbenw]

When using swiz in a constrained environnement (aka mobile) the call to describetype is a major performance pb (cpu / memory allocated).
describetypejson seems to be a better alternative.

see also https://groups.google.com/forum/#!searchin/swiz-framework/describetypejson/swiz-framework/h0QQIVu_t2o/ai8gqJ5Sn24J

[benbenw]

see also
https://issues.apache.org/jira/browse/FLEX-33810

[Dretch]

This Is affecting me too.

I also noticed when profiling that BeanFactory does what looks like an unnecessary amount of array allocations via Array.concat, see: https://github.com/swiz/swiz-framework/blob/develop/src/org/swizframework/core/BeanFactory.as#L364