added .editorconfig - tab inserts 4 spaces
added .editorconfig - tab inserts 4 spaces

IronLanguages/ironpython3,moto-timo/ironpython3,tempbottle/ironpython3,IronLanguages/ironpython3,IronLanguages/ironpython3,tempbottle/ironpython3,paweljasinski/ironpython3,paweljasinski/ironpython3,moto-timo/ironpython3,moto-timo/ironpython3,tempbottle/ironpython3,moto-timo/ironpython3,moto-timo/ironpython3,tempbottle/ironpython3,IronLanguages/ironpython3,paweljasinski/ironpython3,paweljasinski/ironpython3,IronLanguages/ironpython3,IronLanguages/ironpython3,tempbottle/ironpython3,paweljasinski/ironpython3,tempbottle/ironpython3,paweljasinski/ironpython3