Merge branch 'master' of github.com:sensu-plugins/sensu-plugins-postgres

prep for 4.2.0 release

Signed-off-by: Ben Abrams <me@benabrams.it>

prep for 4.1.0 release

Merge pull request #134 from sensu-plugins/release/4.0.2

Release/4.0.2  Fix for literal string

Merge pull request #128 from jspaleta/fix/asset-enablement

patch release 4.0.1 to fix asset build enablement

prep for 4.0.0 release

Signed-off-by: Ben Abrams <me@benabrams.it>

use standard travis build script from bonsai repo

comment out rubygem deployer for testing purposes

add custom dockerfiles and update travis config for asset build

comment out rubygem deployer for testing purposes