Merge pull request #59 from ridoo/master

Resolves the xml stream parsing error
added delayed loading of blocks
added delayed loading of blocks
loadoptions added to interface of loaddata
loadoptions added to interface of loaddata
clone protected against failure of the initload
as loadMettadata is also done by setconnector it was superflous here
loadoptions added to interface of loaddata
loadoptions added to interface of loaddata
loadoptions added to interface of loaddata
loadoptions added to interface of loaddata
loadoptions added to interface of loaddata and moved making of the grid (not filling) to the loadmetada
grid is initialized (noy loaded) in the loadmetadat
loadoptions added to interface of loaddata
grid initialized at the right moment
grid is now unique ptr instead of scoped
added interface for getting the grid which is now unoque ptr, removed statics around grid._id which were not necessary
grid is now saved as a reference to a unique ptr
added extra test for error conditions
add postgresql to container exceptions as it is actually a remote data connector without "http(s)"