Update Readme and changelog for v3.0.0

Signed-off-by: Jorge Alarcon Ochoa <[email protected]>

Author: alejandrox1

CHANGELOG.md

@@ -1,6 +1,19 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
+## 3.0.0 - 2018-12-13
+### ADDED
+- Documentationi.
+- TACC/agavepy as dependency.
+
+### CHANGED
+- Rewrite authentication-related scripts.
+- Rewrite files-related scripts.
+
+### REMOVED
+- Test framework (preparing for integration with `TACC/agavepy`).
+
+
 ## 2.3.0 - 2018-08-30
 ### ADDED
 - Integration tests and mock server(test coverage low)

README.md

@@ -102,6 +102,11 @@ After selecting a tenant to interact with, `auth-session-init` will help you
 create an oauth client and obtain an access and a refresh token to get you
 ready to interact with TACC apis.
 
+To restore a stored session:
+```
+$ auth-session-init -t tenant-name -u your-username -N client-name
+```
+
 For more info on `auth-session-init` see
 [authentication docs](docs/docsite/authentication/auth.rst).