More terms and orientation

Added Cheetah, sha1, utfcpp and  finished the orientation section.

1 files changed, 28 insertions, 3 deletions

diff --git a/doc/DEVELOP.md b/doc/DEVELOP.md
index d7ff7c3f..e3a479d7 100644
--- a/doc/DEVELOP.md
+++ b/doc/DEVELOP.md
@@ -7,6 +7,9 @@ which will be familiar to all developers.
 [**Boost**](http://www.boost.org): a standard set of C++ libraries.  Most
 Boost libraries consist of inline functions and templates in header files.
 
+[**Cheetah**](http://www.cheetahtemplate.org): a Python templating engine,
+used by *./python/server.py*.
+
 [**CMake**](http://www.cmake.org): A cross platform system for building
 from source code.  It uses the *CMakeLists.txt* files.
 
@@ -21,7 +24,11 @@ the *doc/Doxyfile.in* file.
 provides arbitrary precision math.
 
 [**Markdown**](https://daringfireball.net/projects/markdown/): A typesetter
-format that produces *html* files from *\*.md* files.  Note that GitHub automatically renders *.md* files.
+format that produces *html* files from *.md* files.  Note that GitHub
+automatically renders *.md* files.
+
+[**sha1**](http://en.wikipedia.org/wiki/SHA-1): a marginally secure
+cryptographic hash function, used only for signing the license file.
 
 [**Texinfo**](http://www.gnu.org/software/texinfo/): Gnu documentation
 typesetter that produces *html* and *pdf* files from the *doc/\*.texi*
@@ -35,6 +42,9 @@ files.
   [README.md](https://github.com/ledger/ledger/blob/master/README.md), and
   emails the author of the commit if any tests fail.
 
+[**utfcpp**](http://utfcpp.sourceforge.net): a library for handling utf-8
+in a variety of C++ versions.
+
 
 Orientation
 ---
@@ -50,7 +60,22 @@ orientation:
 **./README.md**: user readme file in markdown format, also used as the project
   discription on GitHub.
 
-**./contrib**: contributed scripts of random quality and completion.  They usually require editing to run.
+**./contrib/**: contributed scripts of random quality and completion.  They
+  usually require editing to run.
 
-**./doc**: documentation, licenses, and
+**./doc/**: documentation, licenses, and
   tools for generating documents such as the *pdf* manual.
+
+**./lib/**: a couple libraries used in development.
+
+**./lisp/**: the [Emacs](http://www.gnu.org/software/emacs/)
+  [ledger-mode](http://ledger-cli.org/3.0/doc/ledger-mode.html) lisp code,
+  under the [GPLv2](http://www.gnu.org/licenses/gpl-2.0.html) license.
+
+**./python/**:  samples using the Python ledger module.
+
+**./src/**:  the C++ header and source files in a flat directory.
+
+**./test/**:  a testing harness with subdirectories full of tests
+
+**./tools/**:  an accretion of tools, mostly small scripts, to aid development