Dropping official support for Python 2.6

Author: krischer

.travis.yml

@@ -1,7 +1,6 @@
 language: python
 
 python:
-  - "2.6"
   - "2.7"
   - "3.3"
   - "3.4"

doc/index.ipynb

@@ -25,7 +25,7 @@
       "\n",
       "## Installation\n",
       "\n",
-      "`Pyflex` utilizes [ObsPy](http://obspy.org) (and some of its dependencies) for the processing and data handling. As a first step, please follow the [installation instructions of ObsPy](https://github.com/obspy/obspy/wiki#installation) for your given platform (we recommend the installation with [Anaconda](https://github.com/obspy/obspy/wiki/Installation-via-Anaconda) as it will most likely result in the least amount of problems). `Pyflex` should work with Python versions 2.6, 2.7, 3.3, and 3.4 (mainly depends on the used ObsPy version). To install it, best use `pip`:\n",
+      "`Pyflex` utilizes [ObsPy](http://obspy.org) (and some of its dependencies) for the processing and data handling. As a first step, please follow the [installation instructions of ObsPy](https://github.com/obspy/obspy/wiki#installation) for your given platform (we recommend the installation with [Anaconda](https://github.com/obspy/obspy/wiki/Installation-via-Anaconda) as it will most likely result in the least amount of problems). `Pyflex` should work with Python versions 2.7, 3.3, and 3.4 (mainly depends on the used ObsPy version). To install it, best use `pip`:\n",
       "\n",
       "```bash\n",
       "$ pip install pyflex\n",
@@ -491,4 +491,4 @@
    "metadata": {}
   }
  ]
-}
+}

setup.py

@@ -52,7 +52,6 @@ def read(*names, **kwargs):
         "Operating System :: POSIX",
         "Operating System :: Microsoft :: Windows",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 2.6",
         "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.3",