#156 Grid of All Members

1. Grid showing all active members
2. Add method in ProfilePictureFinder to get gravatar pic width/height 100px
3. Refactor of validateUrl method to handle don't break the page when you are offline (throws UnknownHostException)
4. Add of menuitem in the layout to access members page
5. Add folder plus .xhtml of members view
Merge remote-tracking branch 'upstream/master'
#156 Refactor

1. Remove of comments
2. Add css class to default_theme.css
3. Add of alt attribute in the profile images
4. Add internationalization phrase of the profile image
Merge pull request #179 from Gessyca/master

So, the reason why @Gessyca removed the validation from the entity class is because it was duplicated in the topic.xhtml. Good. +1
Merge pull request #180 from efraimgentil/master

#156 Grid of All Active Members