Bump version number to 0.3
Bump version number to 0.3

rgbkrk/IRkernel,ibm-et/IRkernel,elaOnMars/IRkernel,chendaniely/IRkernel,ChinaQuants/IRkernel,mikecroucher/IRkernel,gdtm86/IRkernel,ibm-et/IRkernel,Phobia0ptik/IRkernel