[spellcheck] Enable SpellCheck on Windows by default.

BUILDING

@@ -21,15 +21,12 @@ General
 Microsoft Windows
 ----------------------------------------------------------------------------------
 
-  You need Microsoft Visual C++ Compiler 2008 or higher and Qt Libraries 4.7.0
-  or higher in order to build QupZilla.
-  Building with Microsoft Visual C++ Compiler 2010 is possible only with Qt 4.8.0
-  and higher. If you try to compile with Qt 4.7, you will get random crashes when
-  running QupZilla.
-  Building with MingW is perhaps possible too, but MingW QtWebKit crashes with
-  every Flash, so MingW is not officially supported.
-  If you don't meet this, please use precompiled version, which is also in smart
-  windows installer.
+  You need Microsoft Visual C++ Compiler 2010 or higher, Qt Libraries 4.8.0
+  or higher, QtWebKit 2.3 or higher and Hunspell library in order to build QupZilla.
+  It is possible, with small changes, to build also with older Microsoft compilers
+  or without Hunspell spellchecking.
+  However, it is not expected from Windows users to build their software, so only
+  one configuration is supported by default.
 
 Linux / Unix
 ----------------------------------------------------------------------------------
@@ -84,6 +81,7 @@ Available Defines
    USE_WEBGL              Enable WebGL. You need to build QupZilla with WebKit built
                           with WebGL support, otherwise you won't be able to compile
                           without errors.
+                          Only for QtWebKit lower than 2.3
                           (disabled by default)
 
                           example:

README.md

@@ -39,6 +39,16 @@ Compiling
 Before you start compiling, make sure that you have installed the Qt (>=4.7) development libraries
 and you have read the BUILDING information.  
 
+**Linux**  
+
+ * pkg-config is optional (to correctly detect versions of QtWebKit)
+ * pkg-config is required for Hunspell spellcheck
+ * Hunspell developer package for spellcheck
+ 
+**Windows**  
+ * QtWebKit 2.3 is required
+ * Hunspell library is required for spellcheck
+
 Then you can start compiling by running this commands:
 
     $ qmake

src/lib/plugins/qtwebkit/qtwebkit-plugins.pri

@@ -8,7 +8,19 @@ SOURCES += $$PWD/qtwebkitplugin.cpp \
 
 DEFINES *= QT_STATICPLUGIN
 
+
 unix:contains(DEFINES, USE_QTWEBKIT_2_3):system(pkg-config --exists hunspell) {
+    buildSpellcheck = true
+    LIBS += $$system(pkg-config --libs hunspell)
+}
+
+win {
+    # QtWebKit 2.3 and Hunspell is now needed to build on Windows
+    buildSpellcheck = true
+    LIBS += $PWD/../../../../bin/libhunspell.dll
+}
+
+equals(buildSpellcheck, true) {
     HEADERS += $$PWD/spellcheck/spellcheck.h \
         $$PWD/spellcheck/speller.h \
         $$PWD/spellcheck/spellcheckdialog.h \
@@ -20,9 +32,4 @@ unix:contains(DEFINES, USE_QTWEBKIT_2_3):system(pkg-config --exists hunspell) {
     FORMS += $$PWD/spellcheck/spellcheckdialog.ui
 
     DEFINES *= USE_HUNSPELL
-    LIBS += $$system(pkg-config --libs hunspell)
-}
-
-win{
-# TODO
 }

src/lib/webview/webview.cpp

@@ -1034,6 +1034,8 @@ void WebView::createMediaContextMenu(QMenu* menu, const QWebHitTestResult &hitTe
 
 void WebView::createSpellCheckContextMenu(QMenu* menu)
 {
+    Q_UNUSED(menu)
+#ifdef USE_HUNSPELL
     menu->addSeparator();
 
     QAction* act = menu->addAction(tr("Check &Spelling"), mApp->speller(), SLOT(toggleEnableSpellChecking()));
@@ -1046,6 +1048,7 @@ void WebView::createSpellCheckContextMenu(QMenu* menu)
     }
 
     menu->addSeparator();
+#endif
 }
 
 void WebView::pauseMedia()