Fix lingering issues with the "Big Island" bugfix

Correct issue in omni_grs_maskspec.pro where a single-element peak is the
brightest, yet is ignored because the "saddle-finding" algorithm requires at
least two points in the peak.  This causes the unintended result of no peak
being fit (since the algorithm loops until it finds the brightest peak.  This
has been corrected by only applying the saddle-finding algorithm to peaks with
2+ elements, and otherwise using single-element peaks as-is.

Also, add !EXCEPT=0 statements to silent the underflow math errors.  Still not
sure where they are coming from, but it doesn't really matter.

	modified:   subroutines/omni_grs_maskspec.pro
Merge branch 'master' into release
Merge branch 'master' of github.com:BGPS/distance-omnibus into release
dos2unix performed on cgsymbol_extra.pro

Performed the dos2unix routine on cgsymbol_extra.pro to make it conform with
the remainder of the code base.  The overall result is a wholesale replacement
of the routine, but oh well.

	modified:   utils/cgsymbol_extra.pro
Add dV/dR rotation curve slope option

Add the dV/dR rotation curve parameter from Reid et al. (2014) to the kinematic
distance calculation and configuration files.  For the moment, we are using
dV/dR = 0, which is consistent with the measured -0.2 +- 0.4 km/s/kpc.  Adding
this parameter to the calculation, however, allows for the easy use of a nonzero
value of this parameter with future revisions of this rotation curve.

	modified:   conffiles/galactic_params.conf
	modified:   rot_curve/omni_vphys2vlsr.pro
	modified:   subroutines/omni_read_conffile_galactic.pro
Update the GRS extraction optimization

Based on the "Big Island" bugfix, recompute the optimization for GRS velocity
extraction.  These values have been updated in ancillary.conf.

	modified:   conffiles/ancillary.conf
Correct convention that V_s is in the direction of circular motion

Update kinematic distance routines with the convention that V_s, as specified
in Reid et al. (2014) is in the direction of circular motion.  Therefore, any
obserbved counterrotation would have negative values of V_s.  The code
previously assumed a counterrotation, and hard-wired the negative sign.  With
this update, routines have been aligned with the current convention.

	modified:   rot_curve/kdist.pro
	modified:   rot_curve/kdist_iau.pro
	modified:   rot_curve/omni_vphys2vlsr.pro
Plotting routine update for the paper

Updates to the generic DPDF plotting routine omni_plot_dpdfs.pro aimed at
making a pretty plot for the upcoming paper.  When not used with the /PAPER
option, no changes are evident.

	modified:   subroutines/omni_plot_dpdfs.pro
Update release string to 0.9.6

	modified:   README.md
Merge branch 'master' into release
Merge pull request #10 from tbowers7/release

V0.9.6 release branch