tweak README

Most importantly, mention 'python3 setup.py'.

Tweak indenting and some wording.

Change-Id: Id8c277de280b54d04edcafa77ed93017d6da473d

README

@@ -1,11 +1,20 @@
 Building/installation:
-sudo python setup.py install
+
+	sudo python setup.py install
+	sudo python3 setup.py install
+
 If you prefer to have it cleanly removable, install checkinstall and run
-sudo checkinstall python setup.py install
-Alternatively, just run 'pip install --user -e ./' or 'pip3 install --user -e ./'
+
+	sudo checkinstall python setup.py install
+
+Alternatively, just run
+
+	pip install --user -e ./
+	pip3 install --user -e ./
+
 depending on your python version.
 
-Use
+Use:
 There are currently following scripts in this package:
 osmotestconfig.py - test that apps start/write with example configs
 soap.py - implementation of SOAP <-> Ctrl proxy implemented on top of Twisted (deprecated, unmaintained)
@@ -20,8 +29,9 @@ twisted_ipa.py - implementation of IPA and Ctrl protocols on top of Twisted fram
 osmodumpdoc.py - dump documentation, superseded by osmo_interact_vty.py -X
 osmotestvty.py - test vty operations, superseded by osmo_verify_transcript_vty.py
 
-Each of these scripts imports a project-specific osmoappdesc.py,
+Some of these scripts import a project-specific osmoappdesc.py,
 which provides information about the available apps, configs, vty ports, etc.
+and is provided by other source trees (like osmo-bsc.git, osmo-msc.git, ...)
 
 Run the scripts with osmoappdesc.py in the current directory (preferred)
 or with -p <the directory containing osmoappdesc.py>.