Fix AttributeError when calling isUnlimited()

This has been fixed for some time in cdat_lite.  An example test which exposes
the bug would be as follows (assuming ncfile exists with variable 'climseas'):

def test_dimension_isUnlimeted():
    f = cdms2.open(ncfile)
    try:
        v = f.variables['climseas']
        t = v.getTime()

        # fails with AttributeError: CdmsFile.dimensions
        assert t.isUnlimited()
    finally:
        f.close()
Adding test for Steven Pascoe fix
Merge branch 'pascoe_master' into add_cdms2_test
First 6 test moved
Added test names to cmakelist
Updated version string
Fixed version string
Merge remote-tracking branch 'devel/fix_version' into release
Migrated more cdms2 tests
Fixed test 08
Got all test going
Merge remote-tracking branch 'devel/add_cdms2_test'
Merge remote-tracking branch 'origin/release'
Merge branch 'add_cdms2_test' into release
Ensure pylibxml2 build finds libxml2 includes

pylibxml2 was using system includes for libxml2. Instead add include
directory in build tree to search path, so we pick up the version we
are building.
Fixed two dock icons for Mac
Fixed two dock icons for Mac
Merge remote-tracking branch 'devel/371_fix_two_dock_icons_release' into release
Ensure pylibxml2 build finds libxml2 includes

pylibxml2 was using system includes for libxml2. Instead add include
directory in build tree to search path, so we pick up the version we
are building.
Merge remote-tracking branch 'devel/pylibxml-include-fix-release' into release