Update docs around migration script

and ensure ~/.local/bin is in PATH on OS X

.gitignore

@@ -1 +1,2 @@
 *.coverprofile
+.extracted-examples

.travis.yml

@@ -18,6 +18,7 @@ matrix:
   include:
   - go: 1.6.2
     os: osx
+    env: PATH=$HOME/.local/bin:$PATH
   - go: 1.1.2
     install: go get -v .
     before_script: echo skipping gfmxr on $TRAVIS_GO_VERSION

CHANGELOG.md

@@ -15,8 +15,8 @@
 
 ### Removed
 - the ability to specify `&StringSlice{...string}` or `&IntSlice{...int}`.
-  To migrate to the new API, you may choose to run [this helper
+  To migrate to the new API, you may choose to run [the migrator
-  (python) script](./cli-migrate-slice-types).
+  (python) script](./cli-v1-to-v2).
 - The optimistic reordering of arguments and flags introduced by
   https://github.com/codegangsta/cli/pull/36. This behavior only worked when
   all arguments appeared before all flags, but caused [weird issues with boolean

README.md

@@ -66,6 +66,9 @@ import (
 ...
 ```
 
+**NOTE**: There is a [migrator (python) script](./cli-v1-to-v2) available to aid
+with the transition from the v1 to v2 API.
+
 ### Pinning to the `v1` branch
 
 Similarly to the section above describing use of the `v2` branch, if one wants