Added app:install command (task #4292)
Added app:install command (task #4292)

Added basic app:install command that does most of
common logic and (currently) wordress:install

Will refactor as other template logic will be added

QoboLtd/project-template-cakephp,QoboLtd/project-template,QoboLtd/project-template-wordpress,QoboLtd/project-template-wordpress,QoboLtd/project-template-cakephp,QoboLtd/project-template,QoboLtd/project-template-wordpress,QoboLtd/project-template,QoboLtd/project-template-cakephp,QoboLtd/project-template-cakephp,QoboLtd/project-template-wordpress,QoboLtd/project-template-cakephp