Documentation typos. Fixes #13

Author: danbst

reference/Algorithm.h/Changed.md

@@ -1,6 +1,6 @@
 ---
 layout: default
-title: OnChanged
+title: Changed
 type_tag: function
 groups: 
  - {name: Home, url: ''}
@@ -17,8 +17,8 @@ template
     typename D,
     typename S
 >
-Events<D,Token> OnChangedTo(const Signal<D,S>& target);
+Events<D,Token> Changed(const Signal<D,S>& target);
 {% endhighlight %}
 
 ## Semantics
-Creates a token stream that emits when `target` is changed.
+Creates a token stream that emits when `target` is changed.

reference/Algorithm.h/ChangedTo.md

@@ -1,6 +1,6 @@
 ---
 layout: default
-title: OnChangedTo
+title: ChangedTo
 type_tag: function
 groups: 
  - {name: Home, url: ''}
@@ -18,7 +18,7 @@ template
     typename V,
     typename S = decay<V>::type
 >
-Events<D,Token> OnChangedTo(const Signal<D,S>& target, V&& value);
+Events<D,Token> ChangedTo(const Signal<D,S>& target, V&& value);
 {% endhighlight %}
 
 ## Semantics

tutorials/BasicAlgorithms.md

@@ -26,7 +26,7 @@ public:
     USING_REACTIVE_DOMAIN(D)
 
     EventSourceT<int>   Samples     = MakeEventSource<int>();
-    SignalT<int>        LastSample  = Hold(Samples);
+    SignalT<int>        LastSample  = Hold(Samples, 0);
 };
 {% endhighlight %}
 {% highlight C++ %}
@@ -173,13 +173,13 @@ public:
     USING_REACTIVE_DOMAIN(D)
 
     EventSourceT<int>   Input       = MakeEventSource<D,int>();
-    Signal<int>         Threshold   = MakeSignal<D>(10);
+    SignalT<int>         Threshold   = MakeSignal<D>(10);
 
     // ...
 };
 {% endhighlight %}
 
-We could just use the `Value()` accessor of `Threadhold`:
+We could just use the `Value()` accessor of `Threshold`:
 {% highlight C++ %}
 // Note: This is potentially unsafe
 SignalT<vector<int>> CriticalSamples = Iterate(