tree fixes for npcdistbw + generalized_nn
fixed (?) offsets for block algorithm + adaptive_nn + npcdistbw
Added reference to Cheng, Hall, and Titterington (1997) for the form
of ridging used during cross-validation and estimation for the local
linear estimator
Cleaning up lingering use of `' (ought to be \sQuote{})
fixed two glitches with index-restricted tree searches
fixed an error with the blocking algo in npcdensbw
Merge branch 'master' of https://github.com/JeffreyRacine/R-Package-np
commented out some debug statements
Tweaks to search - more range in initial values from restart to
restart, lower bounds set to avoid ridiging, random directions set for
all variables - to be done - Tristen making new options passable.
Defaults for hbc to 10, fixed (hard coded) nr_directions in
kernel_estimate_quantile as they were 0,0,1 for lbc,hbc,cfac which
broke npqreg - need to be passed, has passed the request to Tristen.
npqreg does not like the hbc=10, changed to 1.5, but expect it will be
passable and tweaked to each function as necessary
in order for the blocking algorithms to work properly in conjunction with adaptive and generalized bandwidths we need to be able to pass the bandwidths into kernel_weighted_sum_np
Need more extreme directions for continuous variables to be robust
with bounded kernels - uniform spreading directions too, well,
uniformly. Added chidev/gasdev rng and replaced ran3(&seed) with
chidev(&seed,3) and it appears this is a more robust choice. Also
reverted lbc and hbc to 0.5 and 1.5 - note they are used to `center'
the chisquare random deviates and also enforce a lower bound. But
there is no strict upper bound anymore.
Merge branch 'master' of https://github.com/JeffreyRacine/R-Package-np
added lbc, hbc, cfac support for npqreg
Added uxkertype, uykertype, oxkertype and oykertype explanations below
the definition of the kernel functions (previously only ukertype and
okertype were mentioned which could leave the impression that they
work for all functions)
fixed lbc, etc. argument passing errors in np_quantile_conditional
Merge branch 'master' of https://github.com/JeffreyRacine/R-Package-np
Corrected error in order of conditional density/distribution manual
bandwidths pointed out by Decet Romain (hat tip) which were reversed
in the man pages (order ought to be y then x, old document listed x
then y).
added a large number of variables which control various aspects of the numerical search.
Merge branch 'master' of https://github.com/JeffreyRacine/R-Package-np

Conflicts:
	src/statmods.c