Merge branch 'hotfix/iss-13'
Added the 'UserProfile' controller.
Added the userProfile.jsp page and its mapping.
Redesigned the users.jsp page.
Fixed #51. Added the ability to see the user's position in the ranking of all users on his profile page.
Fixed #48. Added user profile.
Merge branch 'release/0.12'
Fixed #55. Fixed NPE in actions which include validation without the selected preferred language.
Bumped version number to 0.12.1
Merge branch 'hotfix/iss-55'
Merge branch 'hotfix/iss-55' into develop
Merge branch 'feature/iss-48' into develop
Fixed #52. Added the ability to see how long the user resides on the site.
Fixed #54. Added the ability to see the user's latest article.
Made one-way associations between the user and his articles.
Added the method that returns all articles of the user.
Added the method that returns the latest article of the user.
Fixed #57. Changed the relationship between the user and his articles.
Merge branch 'iss-57' into feature/iss-56
Fixed #56. Added the ability to see the user's articles on his profile page.