README: add some very basic information about compilation from svn
README: add some very basic information about compilation from svn

I hope it's correct.


svn commit r284

scim-im/scim,tzhuan/scim,davispuh/scim,scim-im/scim,tzhuan/scim,scim-im/scim,tzhuan/scim,davispuh/scim,tzhuan/scim,scim-im/scim,davispuh/scim,davispuh/scim