Merge pull request #16 from Devessier/fix-root-transition-without-target

Fix invalid state to enter after a transition without target

Merge pull request #15 from Devessier/fix-transition-from-root

Fix transitions from root state node

Merge pull request #14 from Devessier/fix-sibling-transition-in-compo…

…und-state-issue

Fix sibling transition in compound state issue

Merge pull request #13 from Devessier/improve-errors

Improve invalid transition error

Merge pull request #12 from Devessier/internal-transitions

Fix some bugs on transitions for compound states

Merge pull request #9 from Devessier/run-initial-actions-with-correct…

…-context

Run initial transition actions with correct context

Merge pull request #8 from Devessier/disable-locking

Implement option to disable locking

Merge pull request #7 from Devessier/implement-send-action

Implement send action

Merge pull request #6 from Devessier/fix-empty-target-bug

Allow target to be left blank

Merge pull request #5 from Devessier/implement-hierarchical-states

Implement hierarchical states