Add a hasAlias method to the ColorSpace class

[doug-walker]

And one for NamedTransform too. Basically, convert the following functions into methods. As always, unit tests must be added.

bool hasAlias(const ConstColorSpaceRcPtr & cs, const char * aliasName)
{
    if (cs)
    {
        for (size_t i = 0; i < cs->getNumAliases(); i++)
        {
            if (Platform::Strcasecmp(cs->getAlias(i), aliasName) == 0)
                return true;
        }
    }
    return false;
}

bool hasAlias(const ConstNamedTransformRcPtr & nt, const char * aliasName)
{
    if (nt)
    {
        for (size_t i = 0; i < nt->getNumAliases(); i++)
        {
            if (Platform::Strcasecmp(nt->getAlias(i), aliasName) == 0)
                return true;
        }
    }
    return false;
}

[annieln]

I'll attempt this issue for Dev Days!