Allow to use client side plugins
Add image gallery and markdown preview plugins
Merge pull request #211 from jsilvestre/master

Fixed: share link was buggy with filename with spaces
add spinner picture
improve responsiveness
improve spinner style
fix content position after hiding upload status
improve edit mode
do not display tags for screen width < 900px

+ build
build
display spinner when search is running
make path display proper (search mode)
fix the check all bug

The select all checkbox was marked as selected when there was only three files
selected. That was confusing.
build
do not display button with no effects in public mode
fix bootsrap responsive
fix public display of edit buttons
build
build
remove outline of edit name input (for chrome)