fix for automake 1.13
Merge pull request #13 from felixonmars/master

fix for automake 1.13
Provide relative include path for libxtract.h for compatibility with non-autotools builds
Add .gitignore
Add wavelet-based pitch tracker
Remove obsolete reference to xtract_scalar_private.h
Reinstate path fix
Pass block size to xtract_init_vdsp_data() instead of block size / 2. Fixes bug with erroneous values in second half of spectrum when using vDSP FFT
More xtract functions included in simpletest example
Define M_PI to 3.14159265358979323846264338327 on platforms where it is not provided by math.h
Increment feature count to correct value
Update function prototype to use const for passed in sample buffer
Comment out unused variable
Update definition with const to reflect prototype
Copy out input values for Ooura so the in-place transform doesn't overwrite *data
Dynamically allocate storage in simpltest example. Ooura doesn't seem to like the being passed memory on the stack on Linux. Fixes #11
Print which FFT implementation is being used at startup
Fix memory leak by calling xtract_free_window()
Don't include default CFLAGS in configure
Initialise ooura struct with right amount of memory for ooura FFT. Fixes #11