Add recipe for Geotext

[CurtLH]

No description provided.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/geotext) and found it was in an excellent condition.

[CurtLH]

The Windows build is failing because of the following reason:

import: 'geotext'
Traceback (most recent call last):
  File "C:\bld\geotext_1532138153816\test_tmp\run_test.py", line 2, in <module>
    import geotext
  File "C:\bld\geotext_1532138153816\_test_env\lib\site-packages\geotext\__init__.py", line 7, in <module>
    from .geotext import GeoText
  File "C:\bld\geotext_1532138153816\_test_env\lib\site-packages\geotext\geotext.py", line 87, in <module>
    class GeoText(object):
  File "C:\bld\geotext_1532138153816\_test_env\lib\site-packages\geotext\geotext.py", line 103, in GeoText
    index = build_index()
  File "C:\bld\geotext_1532138153816\_test_env\lib\site-packages\geotext\geotext.py", line 77, in build_index
    cities = read_table(get_data_path('cities15000.txt'), usecols=[1, 8])
  File "C:\bld\geotext_1532138153816\_test_env\lib\site-packages\geotext\geotext.py", line 54, in read_table
    for line in lines:
  File "C:\bld\geotext_1532138153816\_test_env\lib\site-packages\geotext\geotext.py", line 51, in <genexpr>
    lines = (line for line in f if not line.startswith(comment))
  File "C:\bld\geotext_1532138153816\_test_env\lib\encodings\cp1252.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
UnicodeDecodeError: 'charmap' codec can't decode byte 0x81 in position 165: character maps to <undefined>
(C:\bld\geotext_1532138153816\_test_env) C:\bld\geotext_1532138153816\test_tmp>IF 1 NEQ 0 exit 1 

This same thing is seen in this issue

[CurtLH]

I have skipped the Windows build for now. I will rebuild the recipe once the issue is fixed. Otherwise, this one is ready for review @conda-forge/staged-recipes.