Made site for rendering email configurable
Made site for rendering email configurable

- If given to the constructor, overrides the default (user site or default site)
- Used to configure the renderer

njam/CM,christopheschwyzer/CM,njam/CM,fvovan/CM,mariansollmann/CM,vogdb/cm,fauvel/CM,cargomedia/CM,tomaszdurka/CM,fauvel/CM,tomaszdurka/CM,christopheschwyzer/CM,alexispeter/CM,njam/CM,fauvel/CM,njam/CM,fvovan/CM,zazabe/cm,tomaszdurka/CM,tomaszdurka/CM,fvovan/CM,cargomedia/CM,fvovan/CM,cargomedia/CM,vogdb/cm,vogdb/cm,vogdb/cm,cargomedia/CM,mariansollmann/CM,mariansollmann/CM,mariansollmann/CM,tomaszdurka/CM,christopheschwyzer/CM,alexispeter/CM,njam/CM,fauvel/CM,alexispeter/CM,zazabe/cm,zazabe/cm,christopheschwyzer/CM,vogdb/cm,zazabe/cm,alexispeter/CM,fauvel/CM