Continues Integration

Hi, We are looking for a fixed offer to configure a CI for SFDC in the following manner: 1. The infrastructure will work with git repository. 2. In the git the main will be mapped to an ORG where a managed package 3. a merge/commit to the main will trigger the following actions: 3.1. The package prefix will be handled with the following script https://github.com/jordanbaucke/sfdc-namespace-prefix 3.2. The code will be deployed to the org with ant: https://developer.salesforce.com/page/Migration_Tool_Guide 4. utility to deploy a branch to a Dev Org after deleting everything there in one command 5. The code in the GIT contains visualforce (page & component),apex (trigger & class) and meta data (profiles, objects, fields, etc) We will also need a utility to prepare the first version in the git. We want a fix offer for the project including the following sections: 1. manual how to use the different utilities 2. Remote help in the first setup 3.Bug Fixes Thanks, Yishay