Added missing documentation strings

Author: glopesdev

Bonsai.Scripting/ExpressionCondition.cs

@@ -12,6 +12,7 @@ namespace Bonsai.Scripting
     [DefaultProperty("Expression")]
     [WorkflowElementCategory(ElementCategory.Condition)]
     [TypeDescriptionProvider(typeof(ExpressionConditionTypeDescriptionProvider))]
+    [Description("An expression script used to determine which values of the input sequence are accepted.")]
     public class ExpressionCondition : SingleArgumentExpressionBuilder, IScriptingElement
     {
         static readonly MethodInfo whereMethod = typeof(Observable).GetMethods()

Bonsai.Scripting/ExpressionSink.cs

@@ -12,6 +12,7 @@ namespace Bonsai.Scripting
     [DefaultProperty("Expression")]
     [WorkflowElementCategory(ElementCategory.Sink)]
     [TypeDescriptionProvider(typeof(ExpressionSinkTypeDescriptionProvider))]
+    [Description("An expression script used to operate on individual values of the input sequence.")]
     public class ExpressionSink : SingleArgumentExpressionBuilder, IScriptingElement
     {
         static readonly MethodInfo doMethod = typeof(Observable).GetMethods()

Bonsai.Scripting/ExpressionTransform.cs

@@ -12,6 +12,7 @@ namespace Bonsai.Scripting
     [DefaultProperty("Expression")]
     [WorkflowElementCategory(ElementCategory.Transform)]
     [TypeDescriptionProvider(typeof(ExpressionTransformTypeDescriptionProvider))]
+    [Description("An expression script used to transform individual values of the input sequence.")]
     public class ExpressionTransform : SingleArgumentExpressionBuilder, IScriptingElement
     {
         static readonly MethodInfo selectMethod = typeof(Observable).GetMethods()

Bonsai.Scripting/PythonSelectMany.cs

@@ -13,6 +13,7 @@ namespace Bonsai.Scripting
     [DefaultProperty("Script")]
     [WorkflowElementCategory(ElementCategory.Combinator)]
     [TypeDescriptionProvider(typeof(PythonSelectManyTypeDescriptionProvider))]
+    [Description("A Python script used to project each value of the input into an observable sequence.")]
     public class PythonSelectMany : SingleArgumentExpressionBuilder, IScriptingElement
     {
         public PythonSelectMany()

Bonsai.Scripting/PythonSource.cs

@@ -13,6 +13,7 @@ namespace Bonsai.Scripting
     [DefaultProperty("Script")]
     [WorkflowElementCategory(ElementCategory.Source)]
     [TypeDescriptionProvider(typeof(PythonSourceTypeDescriptionProvider))]
+    [Description("A Python script used to generate an observable sequence of values.")]
     public class PythonSource : ZeroArgumentExpressionBuilder, IScriptingElement
     {
         public PythonSource()

Bonsai.Scripting/PythonTransform.cs

@@ -12,6 +12,7 @@ namespace Bonsai.Scripting
     [DefaultProperty("Script")]
     [WorkflowElementCategory(ElementCategory.Transform)]
     [TypeDescriptionProvider(typeof(PythonTransformTypeDescriptionProvider))]
+    [Description("A Python script used to transform individual values of the input sequence.")]
     public class PythonTransform : SingleArgumentExpressionBuilder, IScriptingElement
     {
         public PythonTransform()