Improved building Domoticz

I updated some things to be able to build and run Domoticz on a Synology, there are still some issues I can't figure out because I don't have enough knowledge about building/compiling etcetera.

- One of the first errors was a python struct error (See: https://github.com/SynoCommunity/spksrc/issues/574 ) I was able to "fix" this by doing a "make clean" and "make" command in native/python but I don't know if this is the right solution

- Second thing, the compiler can't find libboost-system-mt, libboost-datetime-mt and libboost-pthreat-mt, I was able to "fix" this by symlinking to the libs without -mt (multi threading?). But again, I don't know if this is the proper way.

- Third thing, in the work dir there is a "domoticz-$revisionNumber" directory and a "staging" directory after compiling, the "staging" directory is used for the package but the contents of the "staging" direcory should be in the "domoticz-$revisionNumber" directory and that should be the package