Add Apache2 license (closes #35)
Add Apache2 license (closes #35)

ccortezb/nsenter,oouyang/nsenter,Yong-Lee/nsenter,ccortezb/nsenter,dalanlan/nsenter,dalanlan/nsenter,jasonchaffee/nsenter,jpetazzo/nsenter,aaam/nsenter,jasonchaffee/nsenter,oouyang/nsenter,BWITS/nsenter,BWITS/nsenter,jpetazzo/nsenter,Yong-Lee/nsenter,aaam/nsenter