Merge multisamplerate changes with master branch

Builds/Linux/Makefile

Builds/MacOSX/open-ephys.xcodeproj/project.pbxproj

Builds/VisualStudio2012/open-ephys.vcxproj

Builds/VisualStudio2012/open-ephys.vcxproj.filters

Builds/VisualStudio2013/open-ephys.vcxproj

Builds/VisualStudio2013/open-ephys.vcxproj.filters

Source/Processors/DataThreads/RHD2000Editor.cpp

Source/Processors/DataThreads/RHD2000Thread.cpp

Source/Processors/DataThreads/RHD2000Thread.h

Source/Processors/FileReader/FileReader.cpp

Source/Processors/FileReader/FileReader.h

Source/Processors/LfpDisplayNode/LfpDisplayCanvas.cpp

Source/Processors/LfpDisplayNode/LfpDisplayCanvas.h

Source/Processors/NetworkEvents/NetworkEvents.cpp

Source/Processors/NetworkEvents/NetworkEvents.h

Source/Processors/PSTH/PeriStimulusTimeHistogramNode.cpp

Source/Processors/PSTH/PeriStimulusTimeHistogramNode.h

Source/Processors/SourceNode/SourceNode.cpp

open-ephys.jucer