Update README with simplified installation procedure

README.rst

@@ -7,24 +7,8 @@ Python bindings for RocksDB. See http://rocksdb.readthedocs.io for a more compre
 Quick install
 -------------
 
-Quick install for debian/ubuntu like linux distributions.
-
 .. code-block:: bash
 
-    $ apt-get install build-essential libsnappy-dev zlib1g-dev libbz2-dev libgflags-dev liblz4-dev
-    $ git clone https://github.com/facebook/rocksdb.git
-    $ cd rocksdb
-    $ mkdir build && cd build
-    $ cmake ..
-    $ make
-    $ cd ..
-    $ export CPLUS_INCLUDE_PATH=${CPLUS_INCLUDE_PATH}${CPLUS_INCLUDE_PATH:+:}`pwd`/include/
-    $ export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}${LD_LIBRARY_PATH:+:}`pwd`/build/
-    $ export LIBRARY_PATH=${LIBRARY_PATH}${LIBRARY_PATH:+:}`pwd`/build/
-
-    $ apt-get install python-dev
-    $ python3 -m venv .venv
-    $ source .venv/bin/activate
     $ pip install rocksdb
 
 
@@ -34,9 +18,9 @@ Quick usage guide
 .. code-block:: python
 
     >>> import rocksdb
-    >>> db = rocksdb.DB("test.db", rocksdb.Options(create_if_missing=True))
+    >>> db = rocksdb.DB('test.db', rocksdb.Options(create_if_missing=True))
     >>> db.put(b'a', b'data')
-    >>> print db.get(b'a')
+    >>> print(db.get(b'a'))
     b'data'