[php] Add multiple Models to the project

Add PMKQuestions and Questionnaire Models to the Models directory of the
project under the .php extention
[php] Add multiple Models to the project

Add Household and Indicator Models to the Models folder in the project
as Household.php and Indicator.php files
[add:php] Add Models to the project

Add Legend, NavigationDetail and OilUsage models to the Model folder in the
project as Legend.php, NavigationDetail.php, OilUsage.php files
Merge branch 'master' of https://github.com/kasunkv/MoDACA
Merge branch 'master' of https://github.com/kasunkv/MoDACA