Makefile: While building, build cache as well

We want to include a precache in our releases. This is to support older CloudStack
management servers which don't have the APIDiscoveryService plugin. The discovery
service was introduced in ACS 4.2 (git) but could be disabled by an admin.

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
config: Start with version 5.0 for future semver based releases

- Start with semver-ing with 5.0 release
- Change maintainer name, email to the ACS Team

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>