Epoch fails to highlight errors on codegen

[edwardalee]

Minimal example:

target C;
main reactorx {}

In Epoch, when code generating, the EclipseErrorReporter fails to highlight errors with the following message:

WARNING: Setting markers in the IDE failed:
org.eclipse.core.internal.resources.ResourceException: Resource '/CTests/src' does not exist.

Curiously, although Eclipse reports no compile errors, line 122 of EclipseErrorReporter.java has a compile error. The line is:

                IMarker marker = iResource.createMarker(IMarker.PROBLEM);

The error is:

The type org.eclipse.core.runtime.jobs.ISchedulingRule cannot be resolved. It is 
 indirectly referenced from required .class files

In branch epoch-error-reporting, I've added a dependency to org.eclipse.core.runtime to MANIFEST.MF. I hope this doesn't create other problems...

In addition, JavaGeneratorUtils.java has an error where it is trying to mark errors on the directory containing the source file rather than the source file itself.