Replaced push.apply() calls with custom concat() function so the V8 stack will not exhaust when a complex query is being processed
Fixed Builder._counter() to allow fractions and to negate the operator if the incoming number is negative.
Handle undefined correctly in Builder._counter().
Added integration tests for incrementing/decrementing negative numbers
Merge pull request #207 from kobalicekp/master

[Improvement] Replaced push.apply() calls with custom concat() function.
allow case insensitive WHERE operators
more comprehensive case insensitive operator test
Merge pull request #212 from dlau/master

allow case insensitive WHERE operators
added 'is' to operators
Merge pull request #222 from danschumann/patch-1

added 'is' to operators
Further changes & test for #222
docs prep for release
release 0.5.11