generate bootstrap-rails default fixed layout
display banner
navbar design
replace div with header and nav
footer design
layout design
title修正
Fix a bug: flip if/else in application.html.erb
index
resize rails logo
layouts/study.html.erb
Fix a bug: in layout/study content_for :content -> :main
study/index
replace study_subject_path with exams_study_subject_materials_path
Fix a bug: narrow the materials for the specific subject
add tab-menu to materials page
overflow-y: scroll
Fix a bug: remove study_subject_path from index#index
Sessions#destroy
generate ProfilesController