Cosmetic fixes to SCons buildsystem

- Removed trailing spaces
- Made sure all indentation is done using tabs (fixes #39)
- Potentially fixed an identation issue for openssl check

core/math/SCsub

@@ -3,5 +3,3 @@ Import('env')
 env.add_source_files(env.core_sources,"*.cpp")
 
 Export('env')
-
-