fix English in README

README.md

@@ -5,8 +5,8 @@
 [![Coverage Status](https://coveralls.io/repos/pwman3/pwman3/badge.png)](https://coveralls.io/r/pwman3/pwman3?branch=develop)
 [![Documentation Status](https://readthedocs.org/projects/pwman3/badge/?version=latest)](https://readthedocs.org/projects/pwman3/?badge=latest)
 
-A nice command line password manager, which can use different database to store your passwords (currently, SQLite, MySQL, 
-    and Postgresql and MongoDB are supported).
+A lightweight command line password manager, which can use different database to store your passwords
+(currently, SQLite, MySQL, Postgresql and MongoDB are supported).
 Pwman3 can also copy passwords to the clipboard without exposing them!
 Besides managing and storing passwords, Pwman3 can also generate passwords using different algorithms.