[FEATURE] sap.m.UploadCollection

Change-Id: I83a8eefd6e6193334386fa5111faadacfe446a6c
[INTERNAL] sap.ui.core coding should run on IE8 whenever possible.

Mid term, we should consider to add polyfills for the ECMA5 stuff
that is missing in IE8 and migrate the code to the ECMA5 methods.

As this is a significant shift in the coding guidelines, it requires 
a bit more thinking (and discussion and testing). As a short term
solution, jQuery substitute methods need to be used.

'Most wanted' candidates for polyfills:
- Array.isArray
- Array.prototype.every
- Array.prototype.filter
- Array.prototype.forEach
- Array.prototype.indexOf
- Array.prototype.map
- Array.prototype.some
- Date.now
- Function.prototype.bind
- Object.keys
- String.prototype.trim()

Note: some packaged thirdparty components are known not to support 
IE8: blanket, d3, handlebars, less.

Change-Id: I9c13000d77e3d9f669fc4b07124f954c5c93fe51
Merge "[INTERNAL] sap.ui.core coding should run on IE8 whenever possible."
Merge "[FEATURE] sap.m.UploadCollection"