Merge pull request #3 from reverbrain/develop

Version 2.3.0
core: redundant typename removed
v2.3.1
web: stacked_histogram prettified
web: Unused js removed. We load amcharts from web link
web: quintile calculation fixed
web: For each action we show last tree now
web: typo fixed
web: Call graph added to stacked histogram. Time axis now have 1s update interval.
web: title added to calls graph
web: simple histograms removed
web: histograms timestamps are now based on startTime of actions
web: sort bucket actions before counting quintiles
web: min and max timestamps added
core: actions_set: Code refactoring. Docs fixes.
core: aggregators: Docs added.
core: call_tree: Docs fixes. Small code refining.
core: utils: copyright added
core: define guards update, REACT prefix is used now
api: Docs added.