validation object to check stock count value. valid != undefined, negative, NaN, blank input
added next and prev function to validate entry for moving forward or backward
added test for validation function
replaced old counter with new function to validate form entry before proceeding to the next level
Merge branch 'develop' into stock-count/entry-validation

Conflicts:
	app/scripts/services/stockcountfactory.js
	test/spec/services/stockcountfactory.js
fixed dependency issue ($filter) and added comma to separate return function/variables
merge `develop` to `stock-count/validation`
added entry step instructions, changed click function from `next()/prev()` to `changeState()` refs item:264
replaced `next()/prev()` with `changeState`
Merge pull request #120 from musamusa/stock-count/entry-validation

Stock count/entry validation refs #217