added experimental features

Author: jtdub

docs/experimental-features.md

@@ -0,0 +1,32 @@
+# Experimental Features
+
+Experimental features are those features that work, but haven't been thoroughly tested enough to feel confident to use in production.
+
+## Rollback Configuration
+
+Starting in version 2.0.2, a featured called rollback configuraiton was introduced. The rollback configuration is exactly what it sounds like. It renders a rollback configuration in the event that a remediation causes a hiccup when being deployed. The rollback configuration does the inverse on a remediation. Instead of a remediation being renedered based upon the generated config, a rollback remediation is rendered from the generated config based upon the running configuration.
+
+A rollback configuration can be rendered once the running and generated configurations are loaded. Below is an example.
+
+```bash
+>>> from hier_config import Host
+>>> host = Host(hostname="aggr-example.rtr", os="ios")
+>>> host.load_running_config_from_file("./tests/fixtures/running_config.conf")
+>>> host.load_generated_config_from_file("./tests/fixtures/generated_config.conf")
+>>> rollback = host.rollback_config()
+>>> for line in rollback.all_children_sorted():
+...     print(line.cisco_style_text())
+... 
+no vlan 4
+no interface Vlan4
+vlan 3
+  name switch_mgmt_10.0.4.0/24
+interface Vlan2
+  no mtu 9000
+  no ip access-group TEST in
+  shutdown
+interface Vlan3
+  description switch_mgmt_10.0.4.0/24
+  ip address 10.0.4.1 255.255.0.0
+>>> 
+```

mkdocs.yml

@@ -9,3 +9,4 @@ nav:
 - Install: install.md
 - Getting Started: getting-started.md
 - Advanced Topics: advanced-topics.md
+- Experimental Features: experimental-features.md