WifiPositioning: add AndroidParticleFilter as Maven module.
AndroidParticleFilter: added dependency to BaseLibrary, KNNLibrary & SLF4JAndroid.
WifiPositioning: added ProbabilisticLibrary as Maven module.
Re-organised functions between ProbabilisticLibrary, KNNLibrary and AndroidParticleFilter.
WifiPositioning: added KNNFramework as Maven module.
KNNFramework: added BaseLibrary & KNNLibrary dependency, added SLF4J logging, brought up to date with library versions.
WifiPositioning: added AndroidKNN as Maven module.
AndroidKNN: added BaseLibrary & KNNLibrary dependency, brought up to date with library versions.
WifiPositioning: added AndroidDetector as Maven module.
AndroidDetector: added Google Client, Google Services & GSON dependency, brought up to date with library versions, still errors to resolve with Google code.
Updated README.md at top and WifiPositioning levels.
Removed AndroidParticleFilter as now a module under WifiPositioning.