CI Version number change

[Jonathan Riddell]

I noticed that our version numbers mean we can't reliable upgrade the foundation

1.0+git20160201+15.10 can't be upgraded to 1.0+git20160101+16.04
because the build for the newer foundation happens to be a bit older.

So I changed it to 1.0+p15.10+git20160201 which can be upgraded to
1.0+p16.04+git20160101.

The p stands for platform.

This will affect new builds of software built from version control on
our CI deployments.

Let me know of any problems

Jonathan