Fixing bootstrap scripts

The scripts git-all.sh, git-checkout-all.sh, git-clone-others.sh and mvn-all.sh fail when the project path contain spaces.

They fail the following way:

javi@default:~/Drools and jBPM$ droolsjbpm-build-bootstrap/script/git-all.sh pull
droolsjbpm-build-bootstrap/script/git-all.sh: línea 41: cd: /home/javi/Drools: No existe el fichero o el directorio
cat: /home/javi/Drools: No existe el fichero o el directorio
cat: and: No existe el fichero o el directorio
cat: jBPM/droolsjbpm-build-bootstrap/script/repository-list.txt: No existe el fichero o el directorio

This code add "" in places where it is needed