Adding LeftToRight Effect (Fixes #125)

Effects/LeftToRight.OBS.FX.ps1

@@ -0,0 +1,41 @@
+<#
+.SYNOPSIS
+    Moves an item from left to right
+.DESCRIPTION
+    Moves an item from -50% to 150% width.
+#>
+param(
+# The name of the scene.
+[string]
+$SceneName,
+
+# The name 
+[string]
+$SceneItemID,
+
+# The duration (by default, one second)
+[timespan]
+$Duration = "00:00:01"
+)
+
+if (-not $SceneName -and $this -and $this.SceneName) {
+    $SceneName = $this.SceneName
+}
+
+if (-not $SceneItemID -and $this -and $this.SceneItemID) {
+    $SceneItemID = $this.SceneItemID
+}
+
+if (-not $SceneItemID -and $SceneName) { return }
+
+$sceneItem = if ($this.SceneName -and $this.SceneItemID) {
+    $this
+} elseif ($SceneItemID) {
+    Get-OBSSceneItem -SceneName $this.SceneName | 
+        Where-Object { 
+            $_.SceneItemID -eq $SceneItemID -or 
+            $_.SourceName -eq $SceneItemID
+        }
+}
+
+$this.Animate(@{x="-50%"}, @{x='150%'}, $Duration, $true)