Merge pull request #1208 from hongriTianqi/develop

doc: note to use the develop branch of phonopy

Author: caic99

docs/examples/phonopy.md

@@ -3,7 +3,7 @@
 [back to main page](../../README.md)
 
 
-[Phonopy](https://github.com/phonopy/phonopy) is a powerful package to calculate phonon and related properties. It has provided interface with ABACUS. In the following, we take the FCC aluminum as an example:
+[Phonopy](https://github.com/phonopy/phonopy) (Note: please use the `develop` branch, rather than the `master` branch until the abacus interface has been merged into phonopy's `master` branch.) is a powerful package to calculate phonon and related properties. It has provided interface with ABACUS. In the following, we take the FCC aluminum as an example:
 
 
 1. Prepare a 'setting.conf' with following tags:
@@ -39,4 +39,4 @@ PRIMITIVE_AXES = 0 1/2 1/2  1/2 0 1/2  1/2 1/2 0
 BAND= 1 1 1  1/2 1/2 1  3/8 3/8 3/4  0 0 0   1/2 1/2 1/2
 BAND_POINTS = 21
 BAND_CONNECTION = .TRUE.
-```
+```