Add support for python3 and macOS

Author: coderick14

.gitignore

@@ -5,3 +5,4 @@ venv/
 *.egg-info
 *.egg
 constants.json
+.python-version

README.md

@@ -14,6 +14,7 @@ A command line tool to run your code against sample test cases. Without leaving
 + Codechef
 + Spoj
 + Hackerrank
++ AtCoder
 
 #### Supported Languages
 + C
@@ -23,6 +24,10 @@ A command line tool to run your code against sample test cases. Without leaving
 + Ruby
 + Haskell
 
+#### Requirements
++ python3.5
++ coreutils (macOS only)
+
 #### Installation
 ##### Build from source
 + `git clone https://github.com/coderick14/ACedIt`
@@ -102,3 +107,4 @@ acedit --run test.py -s codechef -c AUG17 -p CHEFFA
 ##### Contributors
 + [Lakshmanaram](https://github.com/lakshmanaram)
 + [Igor Kolobov](https://github.com/Igorjan94)
++ [Mayuko Kori](https://github.com/kotapiku)

README.rst

@@ -7,6 +7,7 @@ Supported sites
 -  Codechef
 -  Spoj
 -  Hackerrank
+- Atcoder
 
 Supported languages
 ^^^^^^^^^^^^^^^^^^^

acedit/install_entry.py

@@ -10,7 +10,7 @@ def run(self):
         default_site = 'codeforces'
         cache_dir = os.path.join(os.path.expanduser('~'), '.cache', 'ACedIt')
 
-        from main import supported_sites
+        from acedit.main import supported_sites
 
         for site in supported_sites:
                 # create cache directory structure

acedit/main.py

@@ -1,8 +1,8 @@
 import sys
-import util
+import acedit.util as util
 
 
-supported_sites = ['codeforces', 'codechef', 'hackerrank', 'spoj']
+supported_sites = ['codeforces', 'codechef', 'hackerrank', 'spoj', 'atcoder']
 
 
 def validate_args(args):
@@ -17,14 +17,14 @@ def validate_args(args):
         return
 
     if not args['site'] == 'spoj' and args['contest'] is None:
-        print 'Please specify contest code or set a default contest.'
+        print('Please specify contest code or set a default contest.')
         sys.exit(0)
 
     if args['source']:
         return
 
     if args['site'] == 'spoj' and args['problem'] is None:
-        print 'Please specify a problem code for Spoj.'
+        print('Please specify a problem code for Spoj.')
         sys.exit(0)
 
 
@@ -58,7 +58,7 @@ def main():
             util.Utilities.download_contest_testcases(args)
 
         else:
-            print 'Invalid combination of flags.'
+            print('Invalid combination of flags.')
 
     except KeyboardInterrupt:
         # Clean up files here