Remove "license" argument from setup

[petedmarsh]

"license" is only meant to be used if there isn't a classifier available for the license the package is under, there is already one for the MIT license and setup.py already declares it.

Additionaly, the LICENSE file is not packaged with the rest of the library, and so read('LICENSE') fails when attempting to install from pypi (meaning you cannot install 0.1.4 using pip install betfair.py currently).

For example:

@:betfair.py$ pip install betfair.py
Downloading/unpacking betfair.py
  Downloading betfair.py-0.1.4.tar.gz
  Running setup.py (path:/example/build/betfair.py/setup.py) egg_info for package betfair.py
    Traceback (most recent call last):
      File "<string>", line 17, in <module>
      File "/example/build/betfair.py/setup.py", line 79, in <module>
        license=read('LICENSE'),
      File "/example/build/betfair.py/setup.py", line 61, in read
        with open(fname) as fp:
    IOError: [Errno 2] No such file or directory: 'LICENSE'
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 17, in <module>

  File "/example/build/betfair.py/setup.py", line 79, in <module>

    license=read('LICENSE'),

  File "/example/build/betfair.py/setup.py", line 61, in read

    with open(fname) as fp:

IOError: [Errno 2] No such file or directory: 'LICENSE'

----------------------------------------
Cleaning up...
Command python setup.py egg_info failed with error code 1 in /example/build/betfair.py
Storing debug log for failure in /.pip/pip.log