integrated new filtering w/ front end

schedules/app/controllers/search_controller.rb

 class SearchController < ApplicationController
   def index
-    @courses = Course.where(subject: params[:q]).select do |course|
+    @courses = Course.fetch(params).select do |course|
       course.course_sections.count.positive?
     end
   end

schedules/app/views/shared/_navbar.html.erb

@@ -25,7 +25,7 @@
 	    <form action="/search" class="form-inline">
 		<div class="form-group">
 		    <div class="input-group">
-			<input name="q" type="text" class="form-control" placeholder="Search by CRN, course, professor..." aria-describedby="basic-addon2">
+			<input name="query" type="text" class="form-control" placeholder="Search by CRN, course, professor..." aria-describedby="basic-addon2">
 			<div class="input-group-append">
 			    <button class="btn btn-secondary" type="button">
 				<i class="fas fa-search"></i>