update changelog
add support for precision type abstraction using function pointers
fill in content of precision specific functions
enclose malloc operations with try catch
dtype / array management moved to beginning, end is reserved for C-ops
fix dtype handling typo
add support for extra member NFFT.n
add support for parameter NFFT.n
remove now useless nfft_plan struct members from definition
update autogen files
bump version
add docstring
add support for different floating precision via function pointers
update autogen files
fix class definitions
update NFFT usage section
fix hyperlink malformation warning issued by sphinx
update autogen files
Merge remote-tracking branch 'origin/develop'

Conflicts:
	pynfft/nfft.c
	pynfft/solver.c
	pynfft/util.c
update content