improve popup and add scrollbar when overflow
add owj_swipejs which is a binding of swipejs
add ojw_hookjs which is a binding of hookjs
add ojw_hammer_swipe which is a binding of hammer.js' swipe
add ojw_jsstorage which is a binding of js storage local & session + safe type with Deriving_Json
add some basic tools
add some event tools
add some mobile tools
typed getComputedStyle function
add some checks for int_of_pxstring
remove useless logs
add helper functions for size on js element
reorganise + add types for button section
fix global opacity with ojw_popup
Add the opam package informations.

Also add version contraints for ocsigen dependecies.
Fix error in Size: was not working after page change
Merge branch 'master' of https://github.com/ocsigen/ojwidgets
Reswitch to OASIS