UG/Libdoc: Clean-up, enhancements, and re-organization.
UG/Libdoc: Clean-up, enhancements, and re-organization.

Updata issue 1028
I did some more enhancements to the doc in UG. There were so many changes
that another review would be nice. Otherwise I consider the documentation,
and this issue, done.

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