Installation sub-headings & some typos
Installation sub-headings & some typos

humbug/humbug,oswaldderiemaecker/humbug,JSchwehn/humbug,torreytsui/humbug,JSchwehn/humbug,torreytsui/humbug,daniel-mueller/humbug,oswaldderiemaecker/humbug,eniuz/humbug,humbug/humbug,mleko/humbug,MakiCode/humbug,padraic/humbug,padraic/humbug,MakiCode/humbug,eniuz/humbug,mleko/humbug,daniel-mueller/humbug