New: updating Cappuccino from xCodeCapp

This PR add the possibility to update cappuccino from xCodeCapp. How does it work :

- Create a temporary file for cappuccino
- Download Cappuccino. The downloaded Cappuccino will be either the last release or the last version of the master branch (option in the preference)
- Make a jake clean
- Make a jake install

There is a small window to follow the progress of the install (3 steps ; download - clean - install).
If there is a issue with the install, the developer will be notify with which step failed (xCodeCapp internally log everything).
The environment var CAPP_NOSUDO is set to 1. It means, if a developer did a bootstrap or a previous jake install in sudo, the update of cappuccino will fail.

Changed the credit of xCodeCapp and pass it to the version 3.1

Tools/XcodeCapp/XcodeCapp/Info.plist

@@ -2,6 +2,10 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+	<key>XCCLastCappuccinoReleaseURL</key>
+	<string>https://github.com/cappuccino/cappuccino/archive/0.9.7.zip</string>
+	<key>XCCLastCappuccinoMasterBranchURL</key>
+	<string>https://github.com/cappuccino/cappuccino/archive/master.zip</string>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>English</string>
 	<key>CFBundleExecutable</key>
@@ -17,11 +21,11 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>3.0.6</string>
+	<string>3.1</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>3.0.6</string>
+	<string>3.1</string>
 	<key>LSApplicationCategoryType</key>
 	<string>public.app-category.developer-tools</string>
 	<key>LSUIElement</key>