Rob E

Add support to pass "initial head" on repo init

1

By default when initializing a new repository, the initial head is set to be whatever the globally configured value from `init.defaultBranch`. LibGit2Sharp was already exposing the `InitialHead` pointer to pass...

`git init` currently [exposes an option](https://git-scm.com/docs/git-init#Documentation/git-init.txt---initial-branchltbranch-namegt) to set the branch name. Although the property for this [is exposed](https://github.com/libgit2/libgit2sharp/blob/master/LibGit2Sharp/Core/GitRepositoryInitOptions.cs#L16) via a property `InitialHead` on the options builder that gets passed down...

Adds Slack notification when a comment is made to a git repo. For the time being will post on any comment rather than filtering on non octopus users

# Background Historically, we built a version of `Calamari` project for frameworks `NET452`+`NETCORE` to allow referencing libraries which were required for configuring cloud services and which only had support for...

Now that we are compiling for net462 we can update the Nuget libraries being used

The consumer of this method has a [finally statement](https://github.com/OctopusDeploy/Calamari/blob/ab08792af6026aa6e01732d9617d15e2d6e7b100/source/Calamari.AzureAppService/Behaviors/Legacy/LegacyAzureAppServiceBehaviour.cs#L174) which unfortunately seems to [fail sometimes](https://build.octopushq.com/buildConfiguration/OctopusDeploy_Calamari_GateCalamariAzureAppServiceTests/10821131?expandBuildDeploymentsSection=false&hideTestsFromDependencies=false&hideProblemsFromDependencies=false&expandBuildTestsSection=true&expandBuildChangesSection=true&showLog=10821128_5200_1478.1531.5089.5199&logFilter=debug&logView=flowAware). A result of this is that we dont get a chance to see the actual...