external: new subdirectory for all external libraries and submodules.

You will want to 'make distclean' after this.

I also removed libsecp; we use the one in in libwally anyway.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

external/libwally-core/tools/build_python_eggs.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+# Creates tarballs with a binary egg file and setup.py for python2/3.
+# After unpacking, the resulting egg file can be installed with
+# python setup.py easy_install wallycore*.egg
+# Like all tools/ scripts, this should be run from the project root.
+
+PLATFORM=$(python -c 'import platform; print(platform.system().lower())')
+BITS=$(python -c 'import sys; print("64" if sys.maxsize > 2**32 else "32")')
+MACHINE=$(python -c 'import platform; print(platform.machine().lower())')
+NAME="wallycore-$PLATFORM-$MACHINE-$BITS"
+
+function build {
+    ./tools/cleanup.sh
+    virtualenv -p $1 .venv
+    source .venv/bin/activate
+    PYTHONDONTWRITEBYTECODE= $1 setup.py install
+    cp setup.py dist
+    mv dist $NAME-$1
+    tar czf $NAME-$1.tar.gz $NAME-$1
+    sha256sum $NAME-$1.tar.gz >$NAME-$1.tar.gz.sha256
+    #gpg --armor --output $NAME-$1.tar.gz.asc --detach-sign $NAME-$1.tar.gz
+    rm -r $NAME-$1
+    deactivate
+}
+
+build python2
+build python3
+
+./tools/cleanup.sh
+