#577 Perform dogfood check on Travis
#577 Perform dogfood check on Travis

For #577:

* added new build to execute freshly built Qulice over entire code
* due to Travis YML syntax limitations two different commands must be
 specified by environmental variables

jrdalpra/qulice,vkuchyn/qulice,jrdalpra/qulice,vkuchyn/qulice,vkuchyn/qulice,jrdalpra/qulice