Rest

Closes #24

See merge request jastadd/ros2rag!5

Resolve "Cleanup"

Closes #35

See merge request jastadd/ros2rag!4

- finished transformation
- remove indentation from mustache templates
- store YAML in file when --printYaml is given

- changed semantics of ViaTest slightly (setting same value for inputBoth does not change to newly send value as the "FromMqtt-" and "FromRest-" part is not prepended, and therefore it stays the same)

- differentiate between push-send and pull-send

- also fixed bug when using tokens with no type (must be treated implicitly as String)

- make compiler jastaddCompliant
- allow multiple input grammars and connect files
- compiler output are (possibly modified) input grammars, and always three files (MqttHandler.jadd, RagConnect.jadd and RagConnect.relast)

- rename nonterminal (M)Ros2Rag to (M)RagConnect, and attribute ros2rag to ragconnect
- rename starter to safety
- make receiverstub, receiverstub not depend on safety
- make tests not depend on common (copied proto files)

- update relast to (currently) inofficial version able to parse FQN for types in NTA tokens

- Handling of config and protobuf classes moved to ros2rag.common

- Base: inserted DefaultMappings did not account for existing other mappings, but always use type of token
- Base: MqttHandler was not able to have multiple newConnections for the same topic
- Goal: Changed way how last update is handled (now packed into currentStep)
- Goal: Added StartStep
- Goal: Changed wait to be in milliseconds

- remove some unnecessary gradle dependencies

Fixed error to not handle YAML correctly.

Resolve "PoC: Use mustache as template engine"

Closes #19

See merge request jastadd/ros2rag!2