[MONDRIAN-1791] added isLeaf function
[MONDRIAN-1180] Support EXISTING keyword

parser and function definition
tests
reusable code between exists and existing moved to FunUtil
Merge pull request #6 from sszabo/MONDRIAN-1791

[MONDRIAN-1791] added isLeaf function
[MONDRIAN-1791] remove iface override from IsLeaf
Resolve ambiguous access to hierarchies
Merge branch 'evergreen' of https://github.com/tgf/mondrian into evergreen
Merge pull request #7 from portisheadaff/evergreen

Evergreen
StrToSet: Accept no hierarchy, constrained keyword

accept no hierarchy as per mondrian syntax
accept use of constrained keyword, but ssas syntax not supported
behavior is still ALWAYS constrained
[MONDRIAN-1933] [MONDRAIN-1934] improvements for native evaluation for
performance against large dimensions in specific usecases.  Added the
ability to natively evaluate subsets, and converted the subset function to
streaming.  Added the ability to natively evaluate filters utilizing the
count() method for filtering.  Also includes the ability to handle
AddCalculatedMembers() in filters as long as there are no calculated
members in the utilized dimension.  Also added a testing java servlet
filter for logging times spent in various filters.
Merge branch 'evergreen' of https://github.com/tgf/mondrian into evergreen