update nightly builder and add app engine config and docs

tools/README.md

@@ -0,0 +1,56 @@
+These files are stored here as reference and backup for me. You likely
+won’t need them, as the script runs on one of my servers and handles all
+the building for you.
+
+Still, here’s how it goes down:
+- `iitc-nightly.sh` is run by a cronjob. Config: `50 1 * * * /home/pi/iitc-nightly.sh > /dev/null`
+- the ZSH script grabs the latest IITC tarball and extracts it
+- it gets the latest revision sha1
+- builds
+- uploads to Dropbox using [Dropbox-Up](https://github.com/andreafabrizi/Dropbox-Uploader)
+- wild copy magic to get the correct folder structure for app engine
+- uploading to app engine using Google’s appcfg.sh script (available [in the Java AppEngine SDK](https://developers.google.com/appengine/downloads))
+
+
+You don’t need the whole app engine folder, only some files *and folders*.
+The directory structure is shown below where `./appenginesmall/bin/appcfg.sh update war`
+will update all files in `war/` without `war/WEB-INF`.
+
+```
+~/iitc-appengine $ tree
+.
+├── appenginesmall
+│   ├── bin
+│   │   └── appcfg.sh
+│   ├── config
+│   │   └── sdk
+│   │       └── logging.properties
+│   ├── docs
+│   │   └── appengine-web.xsd
+│   └── lib
+│       ├── appengine-tools-api.jar
+│       ├── impl
+│       │   └── agent
+│       ├── opt
+│       │   └── tools
+│       │       └── appengine-local-endpoints
+│       │           └── v1
+│       ├── shared
+│       │   └── jsp
+│       ├── tools
+│       │   └── jsp
+│       └── user
+└── war
+    ├── dist
+    │   ├── …
+    ├── iitc-nightly
+    │   ├── iitc-nightly-latest.user.js
+    │   └── …
+    ├── images
+    │   ├── …
+    ├── screenshots
+    │   ├── …
+    └── WEB-INF
+        ├── appengine-web.xml
+        └── web.xml
+```