Updated NumeralJS version from 1.4.7 to 1.5.3.

Hello,

we needed to update NumeralJS in order to use formatting as '0,0aK' (1000000 ==> 1,000 k) and other NumeralJS improvements.

I just updated the library in lib/numeral.js, ran the tests and they were all ok. I tested my application and it is working.

Appreciate if you can update NumeralJS in Handsontable!