add some tooltips and code documentation
Merge pull request #7 from pmitros/dev

add some tooltips and code documentation
file type/size checking
Merge pull request #8 from pmitros/dev

file type/size checking
Update README.md
add screenshot of the xblock
Merge pull request #9 from pmitros/dev

add screenshot of the xblock
add screenshot of the xblock
Merge pull request #10 from pmitros/dev

add screenshot of the xblock
Update recommender.js
fixing bug in add resource
add some tooltips and code documentation