Sometimes, it can be annoying to see uninteresting, unversioned items—for example, files that result from a program's compilation. The Subversion global-ignores option is a whitespace-delimited list of names of files and directories that Subversion should not display unless they are versioned. The default values are: *.o *.lo *.la *.al .libs *.so *.so.[0-9]* *.a *.pyc *.pyo *.rej *~ #*# .#* .*.swp .DS_Store.
If you want to change this default list follow these steps:
Note: these settings only apply to your user account
More information on the global-config file and its settings can be found here. More information on using fine grained ignores in Versions can be found here.