added github repo links to cleave, nouislider and selectex

Author: zoul0813

fields/cleave.md

@@ -3,7 +3,7 @@
 Format input text content when you are typing.
 
 > Please note, this field depend on the following library:
-- [cleave.js](https://nosir.github.io/cleave.js/)
+- [cleave.js](https://nosir.github.io/cleave.js/) ([github](https://github.com/nosir/cleave.js))
 - [cleave.js phone lib (optional)](https://github.com/nosir/cleave.js/blob/master/doc/phone-lib-addon.md)
 
 ## Special properties of field

fields/nouislider.md

@@ -3,7 +3,7 @@
 Lightweight JavaScript range slider.
 
 > Please note, this field depend on the following library:
-- [noUiSlider](http://refreshless.com/nouislider/)
+- [noUiSlider](http://refreshless.com/nouislider/) ([github](https://github.com/leongersen/noUiSlider/))
 
 ## Special properties of field
 

fields/selectex.md

@@ -4,7 +4,7 @@ This is a select list field for multiple selection.
 > Please note, this field depend on the following library:
 - [jQuery](http://www.jquery.com)
 - [BootStrap](http://getbootstrap.com/)
-- [bootstrap-select](https://silviomoreto.github.io/bootstrap-select/)
+- [bootstrap-select](https://silviomoreto.github.io/bootstrap-select/) ([github](https://github.com/snapappointments/bootstrap-select/))
 
 ## Special properties of field