Update README with latest info

Signed-off-by: David Goulet <dgoulet@riseup.net>

README.md

@@ -46,7 +46,7 @@ Installation
 
 * Type `make all` to compile the plugin.
 
-* Find the plugin at `dovecot/target/lib/dovecot/lib18_scrambler_plugin.so`.
+* Find the plugin at `src/.libs/lib18_scrambler_plugin.so`.
 
 * Copy to `/usr/lib/dovecot/modules/`
 
@@ -55,12 +55,6 @@ Installation
 
 See below for how to configure the plugin.
 
-Tests
--------------------------------------
-
-* Install the gem requirements with `bundle install`.
-* Run tests with `bundle exec make spec-all`
-
 Database
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