Dropped content from the INSTALL file

The docs have it right.

INSTALL

@@ -1,103 +1,4 @@
-Compiling and installing psycopg
-********************************
-
-** Important note: if you plan to use psycopg2 in a multithreaded application,
-   make sure that your libpq has been compiled with the --with-thread-safety
-   option. psycopg2 will work correctly even with a non-thread-safe libpq but
-   libpq will leak memory.
-
-psycopg2 uses distutils for its build process, so most of the process is
-executed by the setup.py script.  Before building psycopg look at
-setup.cfg file and change any settings to follow your system (or taste);
-then:
-
-    python setup.py build
-
-to build in the local directory; and:
-
-    python setup.py install
-
-to install system-wide.
-
-
-Common errors and build problems
-================================
-
-One of the most common errors is trying to build psycopg without the right
-development headers for PostgreSQL, Python or both. If you get errors, look
-for the following messages and then take the appropriate action:
-
-libpq-fe.h: No such file or directory
-  PostgreSQL headers are not properly installed on your system or are
-  installed in a non default path. First make sure they are installed, then
-  check setup.cfg and make sure pg_config points to a valid pg_config
-  executable. If you don't have a working pg_config try to play with the
-  include_dirs variable (and note that a working pg_config is better.)
-
-
-Running the test suite
-======================
-
-The included Makefile allows to run all the tests included in the
-distribution. Just use:
-
-    make
-    make check
-
-The tests are run against a database called psycopg2_test on unix socket
-and standard port. You can configure a different database to run the test
-by setting the environment variables:
-
-- PSYCOPG2_TESTDB
-- PSYCOPG2_TESTDB_HOST
-- PSYCOPG2_TESTDB_PORT
-- PSYCOPG2_TESTDB_USER
-
-The database should be created before running the tests.
-
-The standard Python unittest is used to run the tests. But if unittest2 is
-found it will be used instead, with the result of having more informations
-about skipped tests.
-
-
-Building the documentation
-==========================
-
-In order to build the documentation included in the distribution, use
-
-    make env
-    make docs
-
-The first command will install all the dependencies (Sphinx, Docutils) in
-an 'env' directory in the project tree. The second command will build both
-the html format (in the 'doc/html' directory) and in plain text
-(doc/psycopg2.txt)
-
-
-Using setuptools and EasyInstall
-================================
-
-If setuptools are installed on your system you can easily create an egg for
-psycopg and install it. Download the source distribution (if you're reading
-this file you probably already have) and then edit setup.cfg to your taste
-and build from the source distribution top-level directory using:
-
-    easy_install .
-
-
-Compiling under Windows with mingw32
-====================================
-
-You can compile psycopg under Windows platform with mingw32
-(http://www.mingw.org/) compiler. MinGW is also shipped with IDEs such as
-Dev-C++ (http://www.bloodshed.net/devcpp.html) and Code::Blocks
-(http://www.codeblocks.org). gcc binaries should be in your PATH.
-
-You need a PostgreSQL with include and library files installed. At least v8.0
-is required.
-
-First you need to create a libpython2X.a as described in
-http://starship.python.net/crew/kernr/mingw32/Notes.html. Then run:
-
-    python setup.py build_ext --compiler=mingw32 install
+Installation instructions are included in the docs.
 
+Please check the 'doc/src/install.rst' file or online at
+<http://initd.org/psycopg/docs/install.html>.