Release 1.6 Merge (#73)

* $SnapshotDeepMaintenanceDays = $null disables deep data checks

* updated install binary links to v0.14

* add config point for additional backup parameters

* - backup and maintenance run independently
- fixed issues with several incorrect function return values

* check for new version of restic during maintenance

* removing duplicate excludes, resolves #60

* update restic .exe version
add self-update to the install script

* Release 1.6 Changelog updates

install.ps1

@@ -5,10 +5,10 @@
 if(-not (Test-Path $ResticExe)) {
     $url = $null
     if([Environment]::Is64BitOperatingSystem){
-        $url = "https://github.com/restic/restic/releases/download/v0.12.1/restic_0.12.1_windows_amd64.zip"
+        $url = "https://github.com/restic/restic/releases/download/v0.15.0/restic_0.15.0_windows_amd64.zip"
     }
     else {
-        $url = "https://github.com/restic/restic/releases/download/v0.12.1/restic_0.12.1_windows_386.zip"
+        $url = "https://github.com/restic/restic/releases/download/v0.15.0/restic_0.15.0_windows_386.zip"
     }
     $output = Join-Path $InstallPath "restic.zip"
     Invoke-WebRequest -Uri $url -OutFile $output
@@ -17,6 +17,8 @@ if(-not (Test-Path $ResticExe)) {
     Get-ChildItem *.exe | Rename-Item -NewName $ExeName
 }
 
+# Invoke restic self-update to check for a newer version
+& $ResticExe self-update
 
 # Create log directory if it doesn't exit
 if(-not (Test-Path $LogPath)) {