Reorganized the directory structure

README.md

@@ -1,4 +1,13 @@
-QSE provides an AWK interpreter, a SED stream editor and many more.
+The QSE library implements AWK, SED, and other Unix commands in an embeddable
+form and defines data types, functions, and classes that you can use when you
+embed them into an application. It also provides more fundamental data types
+and functions needed when you deal with memory, streams, data structures. The
+interface has been designed to be flexible enough to access various aspects of
+embedding application and an embedded object from each other.
+
+* The library is licensed under the BSD license. See the LICENSE file.
+* The project code is hosted at https://code.miflux.com/hyung-hwan/qse and is mirrored
+  at https://github.com/hyung-hwan/qse
 
 * [QSEAWK Language](qse/doc/page/awk-lang.md)
-* [QSEAWK Embedding Guide](qse/doc/page/awk-embed.md)
+* [QSEAWK Embedding Guide](qse/doc/page/awk-embed.md)