Updated block_fwt and block_ifwt to work again
Removed incomplete demo_introframes
Sorting out licenses in thirdparty/Playrec
Doc updates
Added makefile for cross-compilation

Allows cross-compiling win32 and win64 binaries using the MXE
environment (see http://mxe.cc/) and header of Makefile_crossmingw
Automatically removing 'src/autom4te.cache' dir when doing release
Split definition of some DT wavelet filters to two plain wavelet filters
Tests test_dtwfb.m and tets_dtwfb2filterbank.m now pass
Updated wavelets/Contents.m
Correct casts to single in comp_ifilterbank_fft/fftbl