fix #641 Possibility to package page engine resources

This commit introduces the possibility to retrieve site configuration and page definitions from a bundle.
fix #934 Missing and duplicate tests in the suite
fix #858 bump dependencies

Sorted them alphabetically by the way. Minor code fixes done for new
versions of JSHint and Jade.

Close #916.
feat #935 Addition of resources for Estonian language

Close #935
doc Incorrect sample in bean definition for IOAsyncRequestCfg

headers property in aria.core.CfgBeans:IOAsyncRequestCfg had an incorrect sample.

Close #938