First Commit
About page done
Separating files
adding tab2, Input file

* added keybinding for tab switch
* TODO: grid layout for the inputfile tab
New Stucture

* common ifmain block
* dropped python 2 compatibility
adding tab3 Input option

* TODO: auto resize the elements
adding tab4, Input advance options
adding tab5, decoder
adding tab6, output(1)

* few changes to make it cleaner