ArgumentParser: Moved handling argument files into separate class.
ArgumentParser: Moved handling argument files into separate class.

Update issue 1281
Going to enhance arg file support a bit more. Decided to refactor the code a little before that.

wojciechtanski/robotframework,yonglehou/robotframework,fingeronthebutton/robotframework,dkentw/robotframework,ashishdeshpande/robotframework,HelioGuilherme66/robotframework,rwarren14/robotframework,wojciechtanski/robotframework,SivagnanamCiena/robotframework,yahman72/robotframework,moto-timo/robotframework,moto-timo/robotframework,yahman72/robotframework,Colorfulstan/robotframework,edbrannin/robotframework,kyle1986/robortframe,wojciechtanski/robotframework,HelioGuilherme66/robotframework,ashishdeshpande/robotframework,ChrisHirsch/robotframework,fingeronthebutton/robotframework,userzimmermann/robotframework,nmrao/robotframework,Colorfulstan/robotframework,yonglehou/robotframework,snyderr/robotframework,stasiek/robotframework,nmrao/robotframework,ashishdeshpande/robotframework,yonglehou/robotframework,jaloren/robotframework,ChrisHirsch/robotframework,HelioGuilherme66/robotframework,jorik041/robotframework,SivagnanamCiena/robotframework,robotframework/robotframework,alexandrul-ci/robotframework,suvarnaraju/robotframework,un33k/robotframework,joongh/robotframework,edbrannin/robotframework,fingeronthebutton/robotframework,ChrisHirsch/robotframework,kurtdawg24/robotframework,alexandrul-ci/robotframework,xiaokeng/robotframework,jorik041/robotframework,robotframework/robotframework,nmrao/robotframework,alexandrul-ci/robotframework,userzimmermann/robotframework,dkentw/robotframework,alexandrul-ci/robotframework,SivagnanamCiena/robotframework,joongh/robotframework,un33k/robotframework,Colorfulstan/robotframework,jaloren/robotframework,snyderr/robotframework,ashishdeshpande/robotframework,xiaokeng/robotframework,moto-timo/robotframework,yahman72/robotframework,suvarnaraju/robotframework,kyle1986/robortframe,stasiek/robotframework,JackNokia/robotframework,edbrannin/robotframework,un33k/robotframework,nmrao/robotframework,rwarren14/robotframework,rwarren14/robotframework,dkentw/robotframework,suvarnaraju/robotframework,yahman72/robotframework,synsun/robotframework,yahman72/robotframework,robotframework/robotframework,eric-stanley/robotframework,synsun/robotframework,eric-stanley/robotframework,rwarren14/robotframework,Colorfulstan/robotframework,yonglehou/robotframework,fingeronthebutton/robotframework,dkentw/robotframework,suvarnaraju/robotframework,SivagnanamCiena/robotframework,ChrisHirsch/robotframework,xiaokeng/robotframework,stasiek/robotframework,jorik041/robotframework,userzimmermann/robotframework,dkentw/robotframework,joongh/robotframework,userzimmermann/robotframework,ashishdeshpande/robotframework,jaloren/robotframework,wojciechtanski/robotframework,JackNokia/robotframework,SivagnanamCiena/robotframework,synsun/robotframework,snyderr/robotframework,yonglehou/robotframework,stasiek/robotframework,synsun/robotframework,suvarnaraju/robotframework,jaloren/robotframework,joongh/robotframework,un33k/robotframework,JackNokia/robotframework,xiaokeng/robotframework,userzimmermann/robotframework,nmrao/robotframework,xiaokeng/robotframework,alexandrul-ci/robotframework,edbrannin/robotframework,jorik041/robotframework,kurtdawg24/robotframework,kyle1986/robortframe,kurtdawg24/robotframework,ChrisHirsch/robotframework,jorik041/robotframework,JackNokia/robotframework,eric-stanley/robotframework,JackNokia/robotframework,synsun/robotframework,moto-timo/robotframework,eric-stanley/robotframework,moto-timo/robotframework,un33k/robotframework,fingeronthebutton/robotframework,stasiek/robotframework,joongh/robotframework,kyle1986/robortframe,wojciechtanski/robotframework,kurtdawg24/robotframework,rwarren14/robotframework,snyderr/robotframework,Colorfulstan/robotframework,jaloren/robotframework,kurtdawg24/robotframework,snyderr/robotframework,edbrannin/robotframework,kyle1986/robortframe