Force to_i on adapters for forwarded ports in VirtualBox
Improve network interface detection to avoid crash [GH-1480]
add basic pld linux support

PLD Linux Distribution: https://www.pld-linux.org/
Merge pull request #1490 from glensc/pld-distro

add basic pld linux support
Update CHANGELOG
v1.1.3
Default forward port adapter for VirtualBox should be 1
v1.1.4
Up version for development
Proper error message if invalid provisioner is used [GH-1515]
Better detect SSh connections closing
Don't error if machine shuts down really quickly on graceful [GH-1505]
Error message if private key not owned by right user [GH-1503]
Don't load plugins.json plugins in Bundler env
Better plugin dev experience through warnings
More comprehensive synced folder validation [GH-1499]
Don't error too early when config.vm.box is not properly set
Human friendly error on exit code 126 from VBoxManage
better comments on the last change
Properly detect in valid provisioners