add display_name for old user
add MathJax, a web-based math renderer
Merge branch 'featurer/mathjax' into develop
Merge pull request #2 from MegaGod/develop

Add a math renderer from MegaGod
add photo album and photo view
add photo albums menu
add license to photo
Merge branch 'feature/photo_view' into develop
change version numbser to 0.1.8
Merge branch 'release/0.1.8'