addition of colour example.  (#4807)
addition of colour example.  (#4807)

* Colors usage (rgb,rgba,hsv,hex) example.

The following example illustrates various way to express colors (rgb,rgba,hsv,hex) in kivy.

* Layout exploitation example.

The following code  shows all possible layouts possible in the Kivy. The parent layout is PageLayout. Various nesting of layouts is also implemented.

* Delete main.py

* Delete test.kv

* Layout exploitation example.

The following code  shows all possible layouts possible in the Kivy. The parent layout is PageLayout. Various nesting of layouts is also implemented.

* addition of color_format example

* Delete main.py

not required

* Delete rgbusage.kv

not required

* .py + .kv combined to colorusage.py and placed in examples/widgets/colorusage.py

rnixx/kivy,jkankiewicz/kivy,KeyWeeUsr/kivy,Cheaterman/kivy,kived/kivy,LogicalDash/kivy,tony/kivy,kived/kivy,janssen/kivy,janssen/kivy,kivy/kivy,inclement/kivy,manthansharma/kivy,tony/kivy,matham/kivy,jegger/kivy,bionoid/kivy,manthansharma/kivy,matham/kivy,akshayaurora/kivy,jkankiewicz/kivy,inclement/kivy,autosportlabs/kivy,tony/kivy,rnixx/kivy,KeyWeeUsr/kivy,janssen/kivy,Cheaterman/kivy,bionoid/kivy,jegger/kivy,autosportlabs/kivy,inclement/kivy,manthansharma/kivy,kivy/kivy,jkankiewicz/kivy,LogicalDash/kivy,rafalo1333/kivy,Cheaterman/kivy,KeyWeeUsr/kivy,Cheaterman/kivy,kivy/kivy,kived/kivy,LogicalDash/kivy,rafalo1333/kivy,rnixx/kivy,LogicalDash/kivy,KeyWeeUsr/kivy,matham/kivy,bionoid/kivy,autosportlabs/kivy,bionoid/kivy,matham/kivy,jkankiewicz/kivy,akshayaurora/kivy,janssen/kivy,akshayaurora/kivy,jegger/kivy,manthansharma/kivy,jegger/kivy,rafalo1333/kivy