mv html file to html folder

Makefile

-all: index.html 1_understanding_a_computer.html 2_using_the_ifb_cloud.html 3_first_steps_in_a_terminal.html 4_unix_file_system.html 5_users_and_rights.html
+all: html/index.html html/1_understanding_a_computer.html html/2_using_the_ifb_cloud.html html/3_first_steps_in_a_terminal.html html/4_unix_file_system.html html/5_users_and_rights.html
 
 index.html: index.md github-pandoc.css
-	pandoc -s -c github-pandoc.css index.md -o index.html
+	pandoc -s -c github-pandoc.css index.md -o html/index.html
 
-1_understanding_a_computer.html: 1_understanding_a_computer.md github-pandoc.css
-	pandoc -s --toc -c github-pandoc.css 1_understanding_a_computer.md -o 1_understanding_a_computer.html
+html/1_understanding_a_computer.html: 1_understanding_a_computer.md github-pandoc.css
+	pandoc -s --toc -c github-pandoc.css 1_understanding_a_computer.md -o html/1_understanding_a_computer.html
 
-2_using_the_ifb_cloud.html: 2_using_the_ifb_cloud.md github-pandoc.css
-	pandoc -s --toc -c github-pandoc.css 2_using_the_ifb_cloud.md -o 2_using_the_ifb_cloud.html
+html/2_using_the_ifb_cloud.html: 2_using_the_ifb_cloud.md github-pandoc.css
+	pandoc -s --toc -c github-pandoc.css 2_using_the_ifb_cloud.md -o html/2_using_the_ifb_cloud.html
 
-3_first_steps_in_a_terminal.html: 3_first_steps_in_a_terminal.md github-pandoc.css
-	pandoc -s --toc -c github-pandoc.css 3_first_steps_in_a_terminal.md -o 3_first_steps_in_a_terminal.html
+html/3_first_steps_in_a_terminal.html: 3_first_steps_in_a_terminal.md github-pandoc.css
+	pandoc -s --toc -c github-pandoc.css 3_first_steps_in_a_terminal.md -o html/3_first_steps_in_a_terminal.html
 
-4_unix_file_system.html: 4_unix_file_system.md github-pandoc.css
-	pandoc -s --toc -c github-pandoc.css 4_unix_file_system.md -o 4_unix_file_system.html
+html/4_unix_file_system.html: 4_unix_file_system.md github-pandoc.css
+	pandoc -s --toc -c github-pandoc.css 4_unix_file_system.md -o html/4_unix_file_system.html
 
-5_users_and_rights.html: 5_users_and_rights.md github-pandoc.css
-	pandoc -s --toc -c github-pandoc.css 5_users_and_rights.md -o 5_users_and_rights.html
+html/5_users_and_rights.html: 5_users_and_rights.md github-pandoc.css
+	pandoc -s --toc -c github-pandoc.css 5_users_and_rights.md -o html/5_users_and_rights.html