Add support for kwargs in function calls
Support backslash escape of grammar characters
Fix grammar's matchEnum to allow prefix and suffix

This was broken: abc.def.g{h,i,j}k
as well as path components with two enums between dots
added a weighted average function
missed keymap definition for new function
enable get all metrics in CLUSTER_SERVERS
add new function offsetToZero
more documentation and an example for offsetToZero
add graphite-observer to tools.rst
Merge pull request #347 from mprovost/master

new function offsetToZero
Merge pull request #348 from huoxy/master

add graphite-observer to tools.rst
update urls for structured_metrics and graph-explorer
Fix functions._getPercentile by ignoring None values
adding local_settings.py* to .gitignore
Merge pull request #352 from g76r/master

.gitignore for local_settings
Merge pull request #350 from vimeo/tools

update urls for structured_metrics and graph-explorer
Sort dashboard names in the Finder alphabetically and without case sensitivity.
Guard against bad folder permissions when walking stats directory.
add sortByTotal function
test for sortByTotal