Merge branch 'release/1.5.1'

* release/1.5.1:
  Fix a link and little things...
UTF-8
Slight JSlint on popup.js
Slight JSlint before working
Starting the use of the isReady function
Bumping version
Inteligent use of the isReady function
JSlint mgUtil.js
Merge branch 'release/1.5.2'

* release/1.5.2: (53 commits)
  JSlint mgUtil.js
  Inteligent use of the isReady function
  Bumping version
  Starting the use of the isReady function
  Slight JSlint before working
  Slight JSlint on popup.js
  UTF-8
  Fixes #62
  Fixes #63
  Deleted comment blocks
  Change the use of the DOM new image() for jquery object
  Adds imgerror.jpg to the web_accesible_resources
  Changing icons
  Don't use status since there is a already defined var
  return 'return' to the grave
  Testing out
  Forgot to remove something...
  Localization of background
  Remove Release Note from the extension
  Change release note to changelog in option menu
  ...
Merge branch 'release/1.5.2' into develop

* release/1.5.2:
  JSlint mgUtil.js
  Inteligent use of the isReady function
  Bumping version
Change popup default icon
Changed footer
Deleted html background page

We were only using the html page to load js scripts.
Deleting silly console.log
Fix unchanging icon

Regresion introduced with commit 22f78c672ea83e49165fc991a9ae2328b23ebdfe
Corrected image extension
JSLint of bookmark.js
Fix #72

Be aware that there is another bug of prettyphoto that don't correctly get
the image url, trying to use instead the window.location.
Reorder the inclution of the css and js files
Fix valMg being undefined