The final data release of ALLSMOG: a survey of CO in typical local
  low-M* star-forming galaxies
  We present the final data release of the APEX low-redshift legacy survey for
molecular gas (ALLSMOG), comprising CO(2-1) emission line observations of 88
nearby, low-mass (10^8.5<M* [M_Sun]<10^10) star-forming galaxies carried out
with the 230 GHz APEX-1 receiver on the APEX telescope. The main goal of
ALLSMOG is to probe the molecular gas content of more typical and lower stellar
mass galaxies than have been studied by previous CO surveys. We also present
IRAM 30m observations of the CO(1-0) and CO(2-1) emission lines in nine
galaxies aimed at increasing the M*<10^9 M_Sun sample size. In this paper we
describe the observations, data reduction and analysis methods and we present
the final CO spectra together with archival HI 21cm line observations for the
entire sample of 97 galaxies. At the sensitivity limit of ALLSMOG, we register
a total CO detection rate of 47%. Galaxies with higher M*, SFR, nebular
extinction (A_V), gas-phase metallicity (O/H), and HI gas mass have
systematically higher CO detection rates. In particular, the parameter
according to which CO detections and non-detections show the strongest
statistical differences is the gas-phase metallicity, for any of the five
metallicity calibrations examined in this work. We investigate scaling
relations between the CO(1-0) line luminosity and galaxy-averaged properties
using ALLSMOG and a sub-sample of COLD GASS for a total of 185 sources that
probe the local main sequence (MS) of star-forming galaxies and its +-0.3 dex
intrinsic scatter from M* = 10^8.5 M_Sun to M* = 10^11 M_Sun. L'_{CO(1-0)} is
most strongly correlated with the SFR, but the correlation with M* is closer to
linear and almost comparably tight. The relation between L'_{CO(1-0)} and
metallicity is the steepest one, although deeper CO observations of galaxies
with A_V<0.5 mag may reveal an as much steep correlation with A_V. [abridged]
