angularjs: Implement basic upper case filter
angularjs: Implement basic lower case filter

Signed-off-by: Filipe Leuch Bonfim <flb09@inf.ufpr.br>
angularjs: Implement basic generic upper and lower case filter

Signed-off-by: Filipe Leuch Bonfim <flb09@inf.ufpr.br>
angularjs: Create son folder

Signed-off-by: Filipe Leuch Bonfim <flb09@inf.ufpr.br>
angularjs: Implement basic directive with attribute mode

Signed-off-by: Filipe Leuch Bonfim <flb09@inf.ufpr.br>
angularjs: Implement basic directive with element mode

Signed-off-by: Filipe Leuch Bonfim <flb09@inf.ufpr.br>