[p2-dev] Set up API Tooling in your workspace

[Andrew Niefer <aniefer@xxxxxxxxxx>]

Now that we are down-compiling from
1.5 , it is important for everyone to have their workspaces properly set
up with API tooling so that we don't accidentally use 1.5 API in our code.

To do this, install the API Tools Environment
Descriptions from the Galileo update site (General Purpose Tools ->
PDE/API Tools Environment Descriptions).
Then in your Preferences -> Plug-in
Development -> API Errors/Warnings set "Invalid references to system
libraries" to Error.

You will need to clean and rebuild the
workspace.

We are pretty clean so far, I only found
2 problems https://bugs.eclipse.org/bugs/show_bug.cgi?id=298885

-Andrew