Major updates!

Getting closer to something presentable!

• Replaced "magic" resampler with speexdsp
• Improved resampling quality, lower memory usage
• Improved performance on low powered devices
• Included build instructions
• Reduced file size for decoder and encoder workers
• Uglify build files
• Renamed workers
• Improved documentation
• Deprecated recordingTime event to reduce possibility of audio event overflow
• Data is returned as typedArray instead of blob
• Added decoder example