style: Fix PEP8 blank lines issues in Python files

Done with `autopep8 --select=E3,W3`, fixes:

- E301 - Add missing blank line.
- E302 - Add missing 2 blank lines.
- E303 - Remove extra blank lines.
- E304 - Remove blank line following function decorator.
- E309 - Add missing blank line.
- W391 - Remove trailing blank lines.

platform/bb10/detect.py

@@ -7,9 +7,11 @@ import methods
 def is_active():
     return True
 
+
 def get_name():
     return "BlackBerry 10"
 
+
 def can_build():
 
     import os
@@ -17,6 +19,7 @@ def can_build():
         return False
     return True
 
+
 def get_opts():
 
     return [
@@ -29,6 +32,7 @@ def get_opts():
         ('bb10_exceptions', 'Use exceptions when compiling on bb10', 'no'),
     ]
 
+
 def get_flags():
 
     return [
@@ -37,6 +41,7 @@ def get_flags():
         ('module_theora_enabled', 'no'),
     ]
 
+
 def configure(env):
 
     if env['PLATFORM'] == 'win32':
@@ -86,4 +91,3 @@ def configure(env):
         env.Append(LINKFLAGS=['-g'])
 
     env.Append(LIBS=['bps', 'pps', 'screen', 'socket', 'EGL', 'GLESv2', 'GLESv1_CM', 'm', 'asound'])
-