Added special char validation
Added special char validation

To avoid problems with AWS device farm, before create the zip file, the
cs-bdd will search for specials chars. If found it will exit and not
create the zip file.
The user can pass --skip-char-validation to avoid this check

rafaelanastacioalves/sunomono,CSOscarTanner/cs-bdd,concretesolutions/sunomono,CSOscarTanner/cs-bdd,wellavelino/cs-bdd,wellavelino/cs-bdd,rafaelanastacioalves/sunomono,concretesolutions/sunomono,concretesolutions/sunomono,CSOscarTanner/cs-bdd,wellavelino/cs-bdd,rafaelanastacioalves/sunomono