Added typed parameters and return types for events/actions

This release adds support for typed parameters and return-types.
All events will only receive one optional parameter of the same type and an optional return value all the same type.

Rename DSL functions

This build renames a few DSL functions and will break existing code.

state -> whenState
transition -> onEvent
entry -> onEntry
exit -> onExit
pushTransition -> onEventPush
popTransition -> onEventPop
initial -> initialState
initialMap -> initialStates

Remove restriction from event types.

Previously state machine events had to be an enum class.
This restriction has now been removed.
The constructor of the builder does not require a set of valid events of the specific type.
The events will be stored in sets or be used as keys in maps, they require correct implementations of equals and hashCode. Enums, primitive types and data classes are all good candidates.

The documentation has been updated with a packet reader example.

Refactored to support Kotlin style guide

Files moved and companion objects moved.
File renamed.

Externalizing state

This release includes the following:

• Externalizing state
• Documentation improvement
• Refactoring of instance creation

Named state maps, push / pop and automatic transitions

The following features have been added:

• Named state maps
• Push / pop transitions
• Automatic transitions

Rename on to transition

Improve the DSL by rename on to transition