How can I create a role to create,update,delete stored procedures and views
The easiest way is to add a user to the db_ddladmin role.

-- Older method
EXEC sp_addrolemember 'db_ddladmin','username';
-- New method
ALTER ROLE db_ddladmin ADD MEMBER username;


This will give the user the ability to create/modify/drop any object in any schema.  Unfortunately that will include objects you probably don't want them to change (tables for example).  

A more precise method is to use the CREATE permissions.  There is a small trick to using them however.  You will also need to grant ALTER on the schema where they can create/alter the objects.  So to grant the ability to create procedures and views in the dbo schema you might do this.

GRANT ALTER ON SCHEMA::[dbo] TO [UserName];
GRANT CREATE PROCEDURE TO [UserName];
GRANT CREATE VIEW TO [UserName];


Same with CREATE TABLE, CREATE FUNCTION etc.  The reason you need both is this: CREATE PROCEDURE gives you the ability to create the procedure, ALTER schema gives you a place to put the procedure as you create it.  

I should also point out that the CREATE permissions also grant the ability to alter, and drop.