Update installation script.
Update installation script.

- (possibly?) Fix issue that sha256sum does not work.
- Add shebang for good reasons.
- Fix continuing even after an error happens.
denalove/MM2,aghth/MagicMirror,Leniox/MagicMirror,kthorri/MagicMirror,kevinatown/MM,heyheyhexi/MagicMirror,marc-86/MagicMirror,parakrama1995/Majic-Mirror,ConnorChristie/MagicMirror,OniDotun123/MirrorMirror,JimmyBoyle/MagicMirror,prasanthsasikumar/MagicMirror,he3/MagicMirror,berlincount/MagicMirror,Leniox/MagicMirror,Devan0369/AI-Project,Makerspace-IDI/magic-mirror,ryanlawler/MagicMirror,roramirez/MagicMirror,Leniox/MagicMirror,huntersiniard/MagicMirror,denalove/MM2,cameronediger/MagicMirror,jodybrewster/hkthon,NoroffNIS/MagicMirror,roramirez/MagicMirror,skippengs/MagicMirror,Tyvonne/MagicMirror,soapdx/MagicMirror,cs499Mirror/MagicMirror,marc-86/MagicMirror,ShivamShrivastava/Smart-Mirror,vyazadji/MagicMirror,Makerspace-IDI/magic-mirror,enith2478/spegel,ryanlawler/MagicMirror,cs499Mirror/MagicMirror,n8many/MagicMirror,morozgrafix/MagicMirror,thunderseethe/MagicMirror,mbalfour/MagicMirror,fullbright/MagicMirror,he3/MagicMirror,thobach/MagicMirror,Tyvonne/MagicMirror,morozgrafix/MagicMirror,cs499Mirror/MagicMirror,roramirez/MagicMirror,heyheyhexi/MagicMirror,wszgxa/magic-mirror,MichMich/MagicMirror,MichMich/MagicMirror,wszgxa/magic-mirror,marcroga/sMirror,marc-86/MagicMirror,thobach/MagicMirror,JimmyBoyle/MagicMirror,he3/MagicMirror,parakrama1995/Majic-Mirror,thobach/MagicMirror,aschulz90/MagicMirror,marc-86/MagicMirror,marcroga/sMirror,heyheyhexi/MagicMirror,aschulz90/MagicMirror,thobach/MagicMirror,aschulz90/MagicMirror,kevinatown/MM,roramirez/MagicMirror,soapdx/MagicMirror,ConnorChristie/MagicMirror,JimmyBoyle/MagicMirror,marcroga/sMirror,OniDotun123/MirrorMirror,mbalfour/MagicMirror,phareim/magic-mirror,Rimap47/MagicMirror,aghth/MagicMirror,gndimitro/MagicMirror,fullbright/MagicMirror,ryanlawler/MagicMirror,thunderseethe/MagicMirror,n8many/MagicMirror,jamessalvatore/MagicMirror,MichMich/MagicMirror,berlincount/MagicMirror,parakrama1995/Majic-Mirror,Devan0369/AI-Project,morozgrafix/MagicMirror,thunderseethe/MagicMirror,prasanthsasikumar/MagicMirror,prasanthsasikumar/MagicMirror,skippengs/MagicMirror,jodybrewster/hkthon,denalove/MM2,Tyvonne/MagicMirror,Devan0369/AI-Project,phareim/magic-mirror,berlincount/MagicMirror,NoroffNIS/MagicMirror,ShivamShrivastava/Smart-Mirror,Rimap47/MagicMirror,cameronediger/MagicMirror,jamessalvatore/MagicMirror,enith2478/spegel,n8many/MagicMirror,kthorri/MagicMirror,mbalfour/MagicMirror,prasanthsasikumar/MagicMirror,kevinatown/MM,n8many/MagicMirror,wszgxa/magic-mirror,ShivamShrivastava/Smart-Mirror,huntersiniard/MagicMirror,huntersiniard/MagicMirror,fullbright/MagicMirror,skippengs/MagicMirror,n8many/MagicMirror,cmwalshWVU/smartMirror,NoroffNIS/MagicMirror,soapdx/MagicMirror,gndimitro/MagicMirror,vyazadji/MagicMirror,vyazadji/MagicMirror,cameronediger/MagicMirror,cmwalshWVU/smartMirror,ConnorChristie/MagicMirror,Makerspace-IDI/magic-mirror,gndimitro/MagicMirror,cameronediger/MagicMirror,jodybrewster/hkthon,marcroga/sMirror,aghth/MagicMirror,MichMich/MagicMirror,berlincount/MagicMirror,kevinatown/MM,morozgrafix/MagicMirror,kthorri/MagicMirror,jamessalvatore/MagicMirror,OniDotun123/MirrorMirror,phareim/magic-mirror,cmwalshWVU/smartMirror,Tyvonne/MagicMirror,heyheyhexi/MagicMirror,enith2478/spegel,Rimap47/MagicMirror