Refactored transport component and renamed WritersModule.

The goal of the refactoring was to clean up the dependencies of
IncomingBatchConnection and OutgoingBatchConnection.

api/net/sf/briar/api/transport/ConnectionWriter.java

@@ -11,10 +11,6 @@ public interface ConnectionWriter {
 	 */
 	OutputStream getOutputStream();
 
-	/**
-	 * Returns the number of bytes that can be written to this writer without
-	 * outputting more than the given number of bytes, including encryption and
-	 * authentication overhead.
-	 */
-	long getCapacity(long capacity);
+	/** Returns the maximum number of bytes that can be written. */
+	long getCapacity();
 }

api/net/sf/briar/api/transport/ConnectionWriterFactory.java

@@ -4,6 +4,7 @@ import java.io.OutputStream;
 
 public interface ConnectionWriterFactory {
 
-	ConnectionWriter createConnectionWriter(OutputStream out, boolean initiator,
-			int transportId, long connection, byte[] secret);
+	ConnectionWriter createConnectionWriter(OutputStream out, 
+			long capacity, boolean initiator, int transportId, long connection,
+			byte[] secret);
 }

api/net/sf/briar/api/transport/batch/BatchTransportReader.java

@@ -10,7 +10,7 @@ import java.io.InputStream;
 public interface BatchTransportReader {
 
 	/** Returns an input stream for reading from the transport. */
-	InputStream getInputStream() throws IOException;
+	InputStream getInputStream();
 
 	/**
 	 * Closes the reader and disposes of any associated state. This method must

api/net/sf/briar/api/transport/batch/BatchTransportWriter.java

@@ -10,10 +10,10 @@ import java.io.OutputStream;
 public interface BatchTransportWriter {
 
 	/** Returns the maximum number of bytes that can be written. */
-	long getCapacity() throws IOException;
+	long getCapacity();
 
 	/** Returns an output stream for writing to the transport. */
-	OutputStream getOutputStream() throws IOException;
+	OutputStream getOutputStream();
 
 	/**
 	 * Closes the writer and disposes of any associated state. This method must