#1 Implemented functionality for request 1088854

[Michael]

Implementation for request 1088854

Allows dirset to be used in addition to the srcdir element
to specify source directories for the report task. This is
useful if wanting to use wildcards to specify multiple
source directory locations.

[Michael]

Source file net/sourceforge/groboutils/codecoverage/v2/ant/SourceXslReportStyle.java