update STATUS
update version
remove old test programs
update copyright year
split parameters in ET part and program specific part

- ET part contains mostly CTF parameters defining the experimental
setup. This parameter set can be used across different programs.

- AI part holds reconstruction specific values which are needed
(and forced to be present!) only in AI programs.

- splitting causes changes to et_vfuncs also; a wrapper for all
parameter sets is added.

- more program parts to follow
move ET dependent stuff out of operators

Since operators.[ch] are part of the library one level below
ET specific parts, it should not depend on them.

- et_scattering_projection() is now part of a new et_operators module

- xray_backprojection*() functions take axis parameters now directly
instead of through the RecParams structure
fix kernel factors in fft_fwd_postmod()
add famp parameter to template file
WIP: implement forward model