bump version to 2.4.2

assume release = true if local.properties does not exist

2.4.0 release

build android lib on linux host

fix publishing step now running on windows

publish v2.3.0

Merge pull request #60 from fabmax/dev-2.2.2

Dev 2.2.2

Merge pull request #58 from fabmax/upgrade-to-physx-5.2.1

Upgrade to physx 5.2.1

bumped version to 2.1.0

added PxCreateAndPopulateParticleBuffer binding