change closes buttons to &times; instead the letter 'X'
add &times; at close button in coffes and less files
Merge branch 'closes-button' of https://github.com/pedronauck/ngModal

* 'closes-button' of https://github.com/pedronauck/ngModal:
  add &times; at close button in coffes and less files
  change closes buttons to &times; instead the letter 'X'
Upgrades version