[doc] package instructions updated

README.md

@@ -1,14 +1,29 @@
-# CNSPARSER
+# CNS parser
 
 A parser for Dati Personali contained in your Italian Carta Nazionale dei Servizi.
 
+## Components
+* lib: cnsparser's library source code
+* test: testing program
+
 ## Compile
-    $ cd $REPO
+    $ cd $REPOSITORY
     $ mkdir build-$COMPONENT
     $ cd build-$COMPONENT
     $ qmake ../$COMPONENT
     $ make -j$(nproc)
 
+## Install
+First compile using the above commands, then:
+    # make install
+or, if you want to install to a custom root directory:
+    $ make INSTALL_ROOT="/tmp" install
+
+## Package
+### ArchLinux
+    $ cd $REPOSITORY/pkg/tar.xz
+    $ makepkg
+
 ## Disable debugging
-    Populate the following environment variable:
+Populate the following environment variable:
     `QT_LOGGING_RULES="*.debug=false;"`