First shot at implementing multi page legend images
Pulled new page creation out of layouting into rendering procedure
reworked pdf generation with mmultiple pages: added tests to check layouting; fixed rendering
removed duplicated methods existing in the superclass
addde developer test
added mockito dependency
write content length to the response AFTER rendering the pdf to fix broken pdfs
Merge pull request #33 from lat-lon/legendPrinting-356-legendMultiPage

Legend printing 356 legend multi page
Implemented GetFeature hits request to retrieve number of features in bbox for WMS-Layer
Refactored buildRequestUrlFromEnvelope in WmsLayer
Created serverLayerId variable in LegendViaUrlComponentInfo and LegendViaUrlComponentImpl which is filled by the DefaultTemplateBuilder
Implemented usage of serverLayerId to get correct wmsLayer in DynamicLegendComponentImpl