Merge pull request #269 from merriam/master

DEVELOP.md

doc/DEVELOP.md

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+GLOSSARY
+----
+
+Developing the Ledger software uses a number different tools, not all of
+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.
+
+[**CMake**](http://www.cmake.org): A cross platform system for building
+from source code.  It uses the *CMakeLists.txt* files.
+
+[**DOxygen**](http://doxygen.org): generates programming documentation from
+source code files.  Primarly used on C++ sources, but works on all.  Uses
+the *doc/Doxyfile.in* file.
+
+[**GCC**](http://gcc.gnu.org): Gnu Compiler Collection, which includes the
+*gcc* compiler and *gcov* coverage/profiler tool.
+
+[**GMP**](https://gmplib.org): Gnu Multiple Precision Arithmetic Library
+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.
+
+[**Texinfo**](http://www.gnu.org/software/texinfo/): Gnu documentation
+typesetter that produces *html* and *pdf* files from the *doc/\*.texi*
+files.
+
+[**Travis CI**](https://travis-ci.org): a hosted continuous integration
+  service that builds and runs tests each commit posted to GitHub.  Each
+  build creates a [log](https://travis-ci.org/ledger/ledger), updates a
+  [small graphic](https://travis-ci.org/ledger/ledger.png?branch=master) at
+  the top left of the main project's
+  [README.md](https://github.com/ledger/ledger/blob/master/README.md), and
+  emails the author of the commit if any tests fail.