Update jquery.storelocator.js

Added the possibility to set the 'storeLimit' option to -1 that means unlimited.

Added the possibility to set the 'distanceAlert' option to -1 that means disable distance alert.

Added little checks to only format 'web' variable when it is not null otherwise javascript would gives an error.
Merge pull request #8 from ollea/patch-1

Update jquery.storelocator.js