created install & test flag

This flag basically does the same as 'install' and 'test' combined :D

build.sh

@@ -94,6 +94,10 @@ elif [[ "$1" == "install" ]]; then ########## INSTALL ##########
     ###
 
     rm -rf *.o
+else ########## ELSE ##########
+    if [[ "$1" == "installTest" ]]; then ########## INSTALL & TEST ##########
+        ./build.sh install
+        ./build.sh test
     else ########## ERR ##########
         ###
         echo "You have to enter 'test' or 'install' as arguments."
@@ -101,3 +105,4 @@ else ########## ERR ##########
 
         exit 1
     fi
+fi