Build doc updates

contrib/gitian-descriptors/README

@@ -53,3 +53,34 @@ Once you've got the right hardware and software:
 
     # Build Win32 release:
     ./bin/gbuild --commit bitcoin=HEAD ../bitcoin/contrib/gitian-descriptors/gitian-win32.yml
+
+---------------------
+
+gitian-builder now also supports building using LXC. See
+  https://help.ubuntu.com/12.04/serverguide/lxc.html
+... for how to get LXC up and running under Ubuntu.
+
+If your main machine is a 64-bit Mac or PC with a few gigabytes of memory
+and at least 10 gigabytes of free disk space, you can gitian-build using
+LXC running inside a virtual machine.
+
+Here's a description of Gavin's setup on OSX 10.6:
+
+1. Download and install VirtualBox from https://www.virtualbox.org/
+
+2. Download the 64-bit Ubuntu Desktop 12.04 LTS .iso CD image from
+  http://www.ubuntu.com/
+
+3. Run VirtualBox and create a new virtual machine, using the
+  Ubuntu .iso (see the VirtualBox documentation for details).
+  Create it with at least 2 gigabytes of memory and a disk
+  that is at least 20 gigabytes big.
+
+4. Inside the running Ubuntu desktop, install:
+  sudo apt-get install debootstrap lxc ruby apache2 git apt-cacher-ng python-vm-builder
+
+5. Still inside Ubuntu, tell gitian-builder to use LXC, then follow the "Once you've got the right
+  hardware and software" instructions above:
+  export USE_LXC=1
+  git clone git://github.com/bitcoin/bitcoin.git
+  ... etc

doc/release-process.txt

@@ -21,7 +21,7 @@
    export VERSION=0.5.1
    cd ./gitian-builder
 
-  * Fetch and build inputs:
+  * Fetch and build inputs: (first time, or when dependency versions change)
    mkdir -p inputs; cd inputs/
    wget 'http://miniupnp.free.fr/files/download.php?file=miniupnpc-1.6.tar.gz' -O miniupnpc-1.6.tar.gz
    wget 'http://www.openssl.org/source/openssl-1.0.1b.tar.gz'
@@ -29,15 +29,15 @@
    wget 'http://zlib.net/zlib-1.2.6.tar.gz'
    wget 'ftp://ftp.simplesystems.org/pub/libpng/png/src/libpng-1.5.9.tar.gz'
    wget 'http://fukuchi.org/works/qrencode/qrencode-3.2.0.tar.bz2'
-   wget 'http://downloads.sourceforge.net/project/boost/boost/1.47.0/boost_1_47_0.tar.bz2'
+   wget 'http://downloads.sourceforge.net/project/boost/boost/1.50.0/boost_1_50_0.tar.bz2'
    wget 'http://download.qt.nokia.com/qt/source/qt-everywhere-opensource-src-4.7.4.tar.gz'
    cd ..
    ./bin/gbuild ../bitcoin/contrib/gitian-descriptors/boost-win32.yml
-   cp build/out/boost-win32-1.47.0-gitian.zip inputs/
+   mv build/out/boost-win32-1.50.0-gitian2.zip inputs/
    ./bin/gbuild ../bitcoin/contrib/gitian-descriptors/qt-win32.yml
-   cp build/out/qt-win32-4.7.4-gitian.zip inputs/
+   mv build/out/qt-win32-4.7.4-gitian.zip inputs/
    ./bin/gbuild ../bitcoin/contrib/gitian-descriptors/deps-win32.yml
-   cp build/out/bitcoin-deps-0.0.3.zip inputs/
+   mv build/out/bitcoin-deps-0.0.3.zip inputs/
 
   * Build bitcoind and bitcoin-qt on Linux32, Linux64, and Win32:
    ./bin/gbuild --commit bitcoin=v${VERSION} ../bitcoin/contrib/gitian-descriptors/gitian.yml