Add debug logging for each request made with a ConfigFileResolvingHttpRequestFactory.
v2 layer order compatibilty.

In mapfish v2 the layer order was bottom -> top.  In v3 it is top -> bottom.

This PR updates the oldApi request converter to perform the layer re-ordering.
Modify ConfigFileLoaders so that the file can be either in the configuration directory or in the working directory.
Change jasper reports subreport generation to not use multiple threads.
Write a test where the report contains a relative reference to an image in same directory as jrxml file.
Merge pull request #122 from jesseeichar/Http-Request-Logging

Add debug logging for each request made with a ConfigFileResolvingHttpRequestFactory
Merge pull request #123 from jesseeichar/v2-api-reverse-layer-order

V2 api reverse layer order
Merge branch 'jasper-report-use-our-file-loader' into development

Conflicts:
	core/src/main/java/org/mapfish/print/output/Values.java