update readme

README.md

@@ -1,5 +1,4 @@
-H-wave
-========
+# H-wave
 
 H-wave is a program for performing unrestricted Hartree-Fock (UHF) approximation
 for itinerant electron systems.
@@ -10,25 +9,40 @@ H-wave treats two types of UHF approximation: one is real-space and the other is
 wavenumber-space UHF methods using translational symmetry. In the wavenumber space
 UHF method, the input file defining the one-body and two-body interactions is
 based on the Wannier90 format, and the program can be smoothly connected to
-the softwares for deriving effective models from first-principles calculations. 
+the softwares for deriving effective models from first-principles calculations.
+
+## Methods
 
-### Methods
 Hartree-Fock approximation
 
-### Target models
+## Target models
+
 Hubbard model, multi-orbital Hubbard model
 
-### Available physical quantities
+## Available physical quantities
+
 ground-state energy, free energy, etc.
 
 ## Requirement
+
 Python3 with numpy, scipy, and other library packages
 
 ## Install
-You can install H-wave and also get a manual for H-wave from a
-[release page](https://github.com/issp-center-dev/H-wave/releases).
+
+- From PyPI
+
+``` bash
+python3 -m pip install hwave
+```
+
+- From source (if you modify the program)
+
+``` bash
+python3 -m pip install DIRECTORY_OF_THE_REPOSITORY
+```
 
 ## License
+
 The distribution of the program package and the source codes for H-wave follow
 GNU General Public License version 3
 ([GPL v3](https://www.gnu.org/licenses/gpl-3.0.en.html)).
@@ -46,6 +60,7 @@ of The Institute for Solid State Physics, The University of Tokyo.
 - [User Manual](https://www.pasums.issp.u-tokyo.ac.jp/h-wave/en/doc/manual)
 
 ## Authors
+
 Kazuyoshi Yoshimi,
 Yuichi Motoyama,
 Tatsumi Aoyama,