Change 'language' to 'syntax', that is more precise terminology.

Author: aparajita

linter.py

@@ -48,7 +48,7 @@ class PEP8(PythonLinter):
 
     """Provides an interface to the pep8 python module/script."""
 
-    language = 'python'
+    syntax = 'python'
     cmd = ('pep8@python', '*', '-')
     regex = r'^.+?:(?P<line>\d+):(?P<col>\d+): (?:(?P<error>E)|(?P<warning>W))\d+ (?P<message>.+)'
     multiline = True