unconditional density bandwidths now have a member called "timing",
which contains the number of seconds required to compute the last
hit of the objective function
timing added for least-squares unconditional density
added timing for unconditional distribution bandwidths
Added description to use of predict for npqreg
added timing for conditional densities
added timing support for conditional distributions
timing support added for regression
Merge branch 'master' of https://github.com/JeffreyRacine/R-Package-np
Merge branch 'master' into npRmpi

Conflicts:
	R/np.condensity.bw.R
	R/np.condistribution.bw.R
	R/np.density.bw.R
	R/np.distribution.bw.R
	R/np.regression.bw.R