more style fixes and an addition to the coding style

CodingStandards.txt

@@ -162,3 +162,19 @@ d. In general expressions should be roughly as important/semantically meaningful
 
 a. Comments should be doxygen-compilable, using @notation rather than \notation.
 
+12. Include Headers
+
+a. Includes should go in order of lower level (STL -> boost -> libdevcore -> libdevcrypto -> libethcore -> libethereum) to higher level. Lower levels are basically dependencies to the higher levels. For example:
+
+#include <string>
+#include <boost/filesystem.hpp>
+
+#include <libdevcore/Common.h>
+#include <libdevcore/CommonData.h>
+#include <libdevcore/Exceptions.h>
+#include <libdevcore/Log.h>
+#include <libdevcrypto/SHA3.h>
+#include <libethereum/Defaults.h>
+
+b. The only exception to the above rule is the top of a .cpp file where its corresponding header should be located.
+

alethzero/MainWin.cpp

@@ -1902,11 +1902,9 @@ void Main::on_send_clicked()
 				ethereum()->transact(s, value(), m_data, ui->gas->value(), gasPrice());
 				string src = ui->data->toPlainText().toStdString();
 				if (sourceIsSolidity(src))
-				{
-
-					dev::solidity::CompilerStack compiler;
 					try
 					{
+						dev::solidity::CompilerStack compiler;
 						m_data = compiler.compile(src, m_enableOptimizer);
 						for (std::string& s: compiler.getContractNames())
 						{
@@ -1919,7 +1917,6 @@ void Main::on_send_clicked()
 					{
 						statusBar()->showMessage("Couldn't compile Solidity Contract.");
 					}
-				}
 			}
 			else
 				ethereum()->transact(s, value(), fromString(ui->destination->currentText()), m_data, ui->gas->value(), gasPrice());

alethzero/NatspecHandler.cpp

@@ -20,16 +20,15 @@
  * @date 2015
  */
 #include "NatspecHandler.h"
-#include <boost/filesystem.hpp>
 #include <string>
+#include <boost/filesystem.hpp>
 
-#include <libethereum/Defaults.h>
 #include <libdevcore/Common.h>
 #include <libdevcore/CommonData.h>
 #include <libdevcore/Exceptions.h>
 #include <libdevcore/Log.h>
 #include <libdevcrypto/SHA3.h>
-
+#include <libethereum/Defaults.h>
 
 using namespace dev;
 using namespace dev::eth;
@@ -93,7 +92,7 @@ string NatspecHandler::getUserNotice(string const& json, dev::bytes const& _tran
 	}
 
 	// not found
-	return "";
+	return string();
 }
 
 string NatspecHandler::getUserNotice(dev::h256 const& _contractHash, dev::bytes const& _transactionData)