Merge pull request #67 from tsingbx/boolean

add doc for boolean

Author: xushiwei

110-Booleans/boolean-1.gop

@@ -0,0 +1,7 @@
+// The bool type represents Boolean variables. Variables of bool type can have
+// one of two values: true or false. The zero value for a bool is false.
+
+var flag bool // no value assigned, set to false
+var isAwesome = true
+
+println(flag, isAwesome)

110-Booleans/boolean-2.gop

@@ -0,0 +1,5 @@
+// In go+, you can cast bool to number types.
+
+println int(true)       // 1
+println float64(true)   // 1
+println complex64(true) // (1+0i)