Automatically create sketchbook libraries/ folder and readme (Paul Stoffregen and Limor Fried).

http://code.google.com/p/arduino/issues/detail?id=986

Author: damellis

app/src/processing/app/Base.java

@@ -1568,7 +1568,82 @@ static public File getSketchbookFolder() {
 
 
   static public File getSketchbookLibrariesFolder() {
-    return new File(getSketchbookFolder(), "libraries");
+    File libdir = new File(getSketchbookFolder(), "libraries");
+    if (!libdir.exists()) {
+      try {
+        libdir.mkdirs();
+        File readme = new File(libdir, "readme.txt");
+        FileWriter freadme = new FileWriter(readme);
+        freadme.write(_(
+"Installing Additional Arduino Libraries\n" +
+"----------------------------------------\n" +
+"Once you are comfortable with the Arduino software and using the\n" +
+"built-in functions, you may want to extend the ability of your Arduino\n" +
+"with additional libraries.\n" +
+"\n" +
+"What are Libraries?\n" +
+"----------------------------------------\n" +
+"Libraries are a collection of code that makes it easy for you to connect \n" +
+"to a sensor, display, module, etc. For example, the built-in \n" +
+"LiquidCrystal library makes it easy to talk to character LCD displays. \n" +
+"There are hundreds of additional libraries available on the Internet for \n" +
+"download. The built-in libraries and some of these additional libraries\n" +
+"are listed here: http://arduino.cc/en/Reference/Libraries. To use the\n" +
+"additional libraries, you will need to install them.\n" +
+"\n" +
+"How to Install a Library\n" +
+"----------------------------------------\n" +
+"Libraries are often distributed as a ZIP file or folder. The name of the \n" +
+"folder is the name of the library. Inside the folder will be a .cpp \n" +
+"file, a .h file and often a keywords.txt file, examples folder, and other\n" +
+"files required by the library.\n" +
+"\n" +
+"To install the library, first quit the Arduino application.\n" +
+"\n" +
+"Then uncompress the ZIP file containing the library.  For example, if\n" +
+"you're installing a library called \"ArduinoParty\", uncompress\n" +
+"ArduinoParty.zip.  It should contain a folder called ArduinoParty, with\n" +
+"files like ArduinoParty.cpp and ArduinoParty.h inside.  (If the .cpp and\n" +
+".h files aren't in a folder, you'll need to create one.  In this case,\n" +
+"you'd make a folder called \"ArduinoParty\" and move into it all the files\n" +
+"that were in the ZIP file, like ArduinoParty.cpp and ArduinoParty.h.)  \n" +
+"\n" +
+"Drag the ArduinoParty folder into this folder (your libraries folder).\n" +
+"Under Windows, it will likely be called \"My Documents\\Arduino\\libraries\".\n" +
+"For Mac users, it will likely be called \"Documents/Arduino/libraries\".\n" +
+"On Linux, it will be the \"libraries\" folder in your sketchbook.\n" +
+"\n" +
+"Your Arduino library folder should now look like this (on Windows):\n" +
+"  My Documents\\Arduino\\libraries\\ArduinoParty\\ArduinoParty.cpp\n" +
+"  My Documents\\Arduino\\libraries\\ArduinoParty\\ArduinoParty.h\n" +
+"  My Documents\\Arduino\\libraries\\ArduinoParty\\examples\n" +
+"  ....\n" +
+"or like this (on Mac):\n" +
+"  Documents/Arduino/libraries/ArduinoParty/ArduinoParty.cpp\n" +
+"  Documents/Arduino/libraries/ArduinoParty/ArduinoParty.h\n" +
+"  Documents/Arduino/libraries/ArduinoParty/examples\n" +
+"  ...\n" +
+"or similarly for Linux.\n" +
+"\n" +
+"There may be more files than just the .cpp and .h files, just make sure \n" +
+"they're all there.\n" +
+"\n" +
+"(The library won't work if you put the .cpp and .h files directly into\n" +
+"the libraries folder or if they're nested in an extra folder.  For \n" +
+"example:\n" +
+"  Documents\\Arduino\\libraries\\ArduinoParty.cpp and\n" +
+"  Documents\\Arduino\\libraries\\ArduinoParty\\ArduinoParty\\ArduinoParty.cpp\n" +
+"won't work.)\n" +
+"\n" +
+"Restart the Arduino application. Make sure the new library appears in the \n" +
+"Sketch->Import Library menu item of the software.\n" +
+"\n" +
+"That's it! You've installed a library!\n"));
+        freadme.close();
+      } catch (Exception e) {
+      }
+    }
+    return libdir;
   }