Netbox-contract

* [107](https://github.com/mlebreuil/netbox-contract/issues/107) Add the contacts tab to the service provider detail view.
* [111](https://github.com/mlebreuil/netbox-contract/issues/111) Correct assignment spelling.

* [42](https://github.com/mlebreuil/netbox-contract/issues/42) Allow the selection of either providers or Service providers as contract third partie.
* Removed all reference to the direct assignement of circuits to contracts
* [88](https://github.com/mlebreuil/netbox-contract/issues/88) Add a placeholder value to the accounting dimensions jsonfield. This placeholder vale con be configured as part of the PLUGINS_CONFIG parameter in the configuration.py file (see above)
* [89](https://github.com/mlebreuil/netbox-contract/issues/89) add the posibility to link contracts to sites and virtual machines.
* [99](https://github.com/mlebreuil/netbox-contract/issues/99) list child contracts in on the parent view.

* [91](https://github.com/mlebreuil/netbox-contract/issues/91) Replace deprecated ( in netbox version 3.6) MultipleChoiceField.
* [48](https://github.com/mlebreuil/netbox-contract/issues/48) Allow other plugin to inject visual in contract and invoice forms.
* [89] (https://github.com/mlebreuil/netbox-contract/issues/89) Add contract assignement to virtual machines.

* [85](https://github.com/mlebreuil/netbox-contract/issues/85) Fix missing fields contract and invoice import and export forms.

* [80](https://github.com/mlebreuil/netbox-contract/issues/80) Fix missing fields in the API.

* [75](https://github.com/mlebreuil/netbox-contract/issues/74) Fix contract assignement for service providers.
* [73](https://github.com/mlebreuil/netbox-contract/issues/73) Add comment field to contract import form
* [72](https://github.com/mlebreuil/netbox-contract/issues/72) Add fields to the contract assignement bottom tables
* Remove the 'add' actions from the contract assignment list view