merge libmaple docs ("leaflabs-docs") into ./docs

In the past, libample documentation was forked out of this repository
because the documentation had increased in scope. For the librambutan,
and the rambutan project in general, we will try to keep documentation
closer to the source code, so the librambutan-specific documentation
should live here. Other sections of leaflabs-docs will be culled in a
following commit.

This merge attempts to maintain history by using a subtree strategy.
Followed directions at:

    http://nuclearsquid.com/writings/subtree-merging-and-you/

Full history for files should be accessible using the "--follow" flag to
git log, eg:

    git log --follow docs/source/adc.rst

It should be possible to pull patches from leaflabs-docs with:

    git pull -s subtree leaflabs-docs master

... at least until the docs in this repository diverge significantly.

1 files changed, 48 insertions, 0 deletions

diff --git a/docs/source/libmaple.rst b/docs/source/libmaple.rst
new file mode 100644
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+.. highlight:: sh
+
+.. _libmaple:
+
+``libmaple``
+============
+
+LeafLabs' libmaple is the open source library we have developed for
+programming the `STM32 <http://www.st.com/stonline>`_ line of
+microcontrollers.  Libmaple's `source is on GitHub
+<https://github.com/leaflabs/libmaple>`_; :ref:`patches are welcome
+<libmaple-contributing>`.
+
+.. _libmaple-vs-wirish:
+
+Libmaple is split into two pieces: 
+
+- A low-level layer, written in C, called *libmaple proper*, located
+  in the `libmaple/
+  <https://github.com/leaflabs/libmaple/tree/master/libmaple>`_
+  subdirectory of the source repository.
+
+- A high-level layer, written in C++, called *wirish*, in the `wirish/
+  <https://github.com/leaflabs/libmaple/tree/master/wirish>`_
+  subdirectory.
+
+Wirish is :ref:`largely compatible <arduino-compatibility>` with the
+AVR libraries written for the `Arduino <http://arduino.cc>`_ and
+`Wiring <http://wiring.org.co/>`_ development boards. The Wirish
+:ref:`language` page is a good summary of what Wirish provides; a
+:ref:`complete Wirish API index <language-index>` is also
+available. :ref:`Wirish libraries <libraries>` are documented
+separately.
+
+libmaple is bundled with the :ref:`Maple IDE <ide>`.  However, we
+develop it separately, and :ref:`release it standalone
+<unix-toolchain>` for users who might chafe at the "sketch"
+programming model of the IDE. The following pages document libmaple
+proper. As such, they're intended for advanced users who know how to
+write C.
+
+.. toctree::
+   :maxdepth: 1
+
+   libmaple/overview
+   libmaple/apis
+   libmaple/contributing
+   libmaple/coding-standard