fix leak on server side, not store reactI13n instance to global object

#100 - fix leak on server side, not store reactI13n instance to global object

Fix instance of debug nodes

#99 - thanks @roderickhsiao

Debug tool style tweak

#98 - Debug tool style tweak, thanks @roderickhsiao !

Fix warning on [email protected] by not passing i13n props to the native components

#96 - thanks @sebastiendavid !

remove context hack and code optimization

#90 #91 thanks @roderickhsiao !

Added scrollableContainerId option

#85 - Now we can define a scrolling container instead of listen to windows, it helps us to integrate react-i13n with inner scroll, thanks @ebertb !

more defensive for the case that i13n isn't enabled

#89 - more defensive for the case that i13n isn't enabled

React-15

#88 - update to use react 15.

fix js error when integrate with fluxible router

#87 - we are actually be able to integrate with fluxible-router, since NavLink is used everywhere on the page, it might hurt the performance if we use createI13nNode on each NavLink, to solve this we can use I13nMixin directly, this PR fixes a potential issue for this use case.

React-15 support, prevent removing props.viewport and props.modal of createI13nNode

#83 - prevent removing props.viewport and props.modal of createI13nNode
#81 - React-15 support