Add some INSTALL notes, with dependency instructions.

INSTALL.md

@@ -0,0 +1,50 @@
+# Installing pgloader
+
+pgloader version 3.x is written in Common Lisp.
+
+## The lisp parts
+
+The steps depend on the OS you are currently using.
+
+### debian
+
+If you're using debian, it's quite simple actually, see the file
+`bootstrap-debian.sh` within the main pgloader distribution to get yourself
+started.
+
+You will note in particular:
+
+    sudo apt-get install -y sbcl                                  \
+                            git patch unzip                       \
+                            devscripts pandoc                     \
+                            libsqlite3-dev
+
+We need a recent enough [SBCL](http://sbcl.org/) version and that means
+backporting the one found in `sid` rather than using the very old one found
+in current *stable* debian release. See `bootstrap-debian.sh` for details
+about how to backport a recent enough SBCL here (1.1.14 or newer).
+
+### Mac OS X
+
+We suppose you already have `git` and `make` available, if that's not the
+case now is the time to install those tools. The SQLite lib that comes in
+MacOSX is fine, no need for extra software here.
+
+## Building the pginstall tool
+
+Now that the dependences are installed, just type make.
+
+    make
+
+If using Mac OS X, and depending on how you did install `SBCL` and which
+version you have (the brew default did change recently), you might need to
+ask the Makefile to refrain from trying to compress your binary image:
+
+    make COMPRESS_CORE=no
+
+Then you will have a new tool to play with:
+
+    ./build/bin/pgloader --help
+    
+This command should spit out the *usage* information on which parameters are
+accepted in the command line actually.

README.md

@@ -38,10 +38,8 @@ pgloader is now a Common Lisp program, tested using the
 
     $ apt-get install sbcl libsqlite3-dev make curl
     $ cd /path/to/pgloader
-    $ mkdir -p ~/.config/common-lisp/source-registry.conf.d
-    $ echo "(:tree `pwd`)" > ~/.config/common-lisp/source-registry.conf.d/pgloader.conf 
 	$ make pgloader
-	$ ./build/pgloader.exe --help
+	$ ./build/bin/pgloader --help
 
 ### Patches