new folder for nexml converters
Using circular layout (supported in ETE!)
Reporting (once only) of unsupported styles.
example trees folder
Fixing unsupported style reporting (d'oh!)
Adding RAxML example tree files
Global rename of .tss to .nexss (extensions only)

I have not changed the tss: namespace, not sure if we want to do this.
Merge branch 'master' of github.com:OpenTreeOfLife/phylostylotastic
Initial converter files
Merge branch 'master' of github.com:OpenTreeOfLife/phylostylotastic into feature/cmdline