Merge pull request #2 from argilo/master

Various improvements to the sample GRC flowgraph
delete obsolete scripts
delete obsolete install script
delete unused function
del unhelpful comments and whitespace
delete freq_divider and bpsk_demod blocks
fix complie options (c++0x is not required)
fix Wx Panel
add panel to flow graph
panel: ignore german umlauts
panel: update layout after content change
panel: set frequency via event
reset decoder when changing frequency
decoder: serialize reset with mutex
Set V scale parameter for the RDS constellation plot to stop it from constantly rescaling.