README added.

README.md

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+The Hydra Project
+=================
+
+An all-in-one framework for building Haskell apps which has the following
+possibilities out of the box:
+
+- Multithreading
+- Safe STM-powered concurrency
+- Logging
+- Random data generation
+- Many others
+
+With the framework, you can create complex applications that have
+a good maintainability, testability, simplicity, that have a good structure
+and are easy to read and change. The key principles in the framework:
+
+- Layered architecture
+- Separation of Business Logic, Runtime and Implementation
+- Convenient and simple to use eDSLs for Business Logic
+- Layered structure of business application: State, Domain, Business Logic
+
+This project demonstrates the principles of Software Design and Architecture
+in pure Functional Programming.