Merge pull request #4 from andreqi/master

translate to jade and add course search front end. I trust.
seed db
seed db
seed more files
solve issue
Merge pull request #6 from andreqi/master

fixed removeLeaf front end
login and gitignore config
Merge pull request #7 from juancjara/development

Development
login social css
Merge pull request #8 from juancjara/development

login social css
footer
Merge pull request #9 from juancjara/master

update dev
Merge branch 'development' of https://github.com/juancjara/Grades-project into development
footer
Merge pull request #10 from juancjara/development

footer
added simulation and node object