Added README file.

README

+Nektar++
+========
+Nektar++ is an open-source software framework designed to support the
+development of high-performance scalable solvers for partial differential
+equations (PDEs) using the spectral/hp element method.
+
+This package consists of a set of libraries (the framework) and a number of
+pre-written PDE solvers for a selection of application domains.
+
+The software and User Guide is available for download from
+  http://www.nektar.info
+
+
+Pre-requisites
+--------------
+Nektar++ requires the following software to be installed on the users system:
+ - CMake
+ - BLAS/LAPACK
+Additional software is also required. This can either be installed system-wide
+or it can be downloaded and compiled automatically during the build process.
+
+For more detailed information, please see the User Guide.
+
+
+Compilation
+-----------
+On most UNIX-based systems a default compilation can be performed using the following commands from the top-level of the source tree:
+
+  mkdir build
+  cd build
+  cmake ..
+  make
+
+To alter the build configuration (for example, to enable parallel execution
+support) we recommend using the 'ccmake' command instead of 'cmake'. 
+
+For more detailed operating-system specific instructions, please see the
+User Guide.
+
+
+Installation
+------------
+The default installation location is in a 'dist' subdirectory of the 'build'
+directory. This can be changed by setting the 'CMAKE_INSTALL_PREFIX' option
+using 'ccmake'. To install the compiled libraries, solvers and header files, on
+UNIX-based systems run:
+
+  make install
+