Small updates to documentation

Author: tsolomko

Sources/BitReader.swift

@@ -11,7 +11,7 @@ public protocol BitReader: class {
     /// True, if reader's BIT pointer is aligned with the BYTE border.
     var isAligned: Bool { get }
 
-    /// Creates an instance for reading `data`.
+    /// Creates an instance for reading bits (and bytes) from `data`.
     init(data: Data)
 
     /// Reads bit and returns it, advancing by one BIT position.

Sources/BitWriter.swift

@@ -14,7 +14,7 @@ public protocol BitWriter {
     /// True, if writer's BIT pointer is aligned with the BYTE border.
     var isAligned: Bool { get }
 
-    /// Creates an instance for writing.
+    /// Creates an instance for writing bits (and bytes).
     init()
 
     /// Writes `bit`, advancing by one BIT position.

Sources/ByteReader.swift

@@ -27,7 +27,7 @@ public class ByteReader {
         return self.data.endIndex <= self.offset
     }
 
-    /// Creates an instance for reading `data`.
+    /// Creates an instance for reading bytes from `data`.
     public init(data: Data) {
         self.size = data.count
         self.data = data

Sources/LsbBitWriter.swift

@@ -22,7 +22,7 @@ public final class LsbBitWriter: BitWriter {
         return self.bitMask == 1
     }
 
-    /// Creates an instance for writing.
+    /// Creates an instance for writing bits (and bytes).
     public init() { }
 
     /// Writes `bit`, advancing by one BIT position.

Sources/MsbBitWriter.swift

@@ -22,7 +22,7 @@ public final class MsbBitWriter: BitWriter {
         return self.bitMask == 128
     }
 
-    /// Creates an instance for writing.
+    /// Creates an instance for writing bits (and bytes).
     public init() { }
 
     /// Writes `bit`, advancing by one BIT position.