Clarify language in the init prompts
Clarify language in the init prompts

Fixes yeoman/yeoman#611

snatera15/generator-webapp-material,amercier/generator-webapp-php,narainsagar/generator-webapp-php,narainsagar/generator-webapp-php,narainsagar/generator-webapp-php,snatera15/generator-webapp-material,amercier/generator-webapp-php,amercier/generator-webapp-php