Petascope - WCPS: Support .lo/.hi to get lowerBound/upperBound of imageCrsdomain()/domain()

[Bang Pham Huu]

The ticket is about extending WCPS with .lo and .hi for getting lower bound and upper bound from imageCrsDomain and domain operators. Currently, it returns an interval only (standard WCPS 1.0), for example this query:

for $c in (test_eobstest) return imageCrsDomain($c, t)

return (0:5)

It could be extended with .lo

for $c in (test_eobstest) return imageCrsDomain($c, t).lo

return 0

with .hi

for $c in (test_eobstest) return imageCrsDomain($c, t).hi

return 5