Travis: only support numpy supported Python versions

.travis.yml

@@ -2,10 +2,7 @@ language: python
 git:
   depth: 3
 python:
-  - "2.6"
   - "2.7"
-  - "3.2"
-  - "3.3"
   - "3.4"
   - "3.5"
   - "3.5-dev" # 3.5 development branch

README.md

@@ -10,7 +10,7 @@ The reader is written in the [pims](https://github.com/soft-matter/pims) framewo
 ### Installation
 
 If you don't already have the packages `numpy`, `pims`, `six` and `xmltodict`, they will be installed automatically if you use the `setup.py` script.
-`nd2reader` is an order of magnitude faster in Python 3. I recommend using it unless you have no other choice.
+`nd2reader` is an order of magnitude faster in Python 3. I recommend using it unless you have no other choice. Python 2.7 and Python >= 3.4 are supported.
 
 ### ND2s