debugme 1.2.0

• debugme now does not instrumented code multiple times, this
  could happen if environments were referenced from multiple
  places (#15).

• debugme now correctly instruments functions with attributes,
  the attributes are kept now. Some packages, e.g. assertthat create
  such functions.

• debugme now supports debug levels. Relatedly, debugme() has a
  level argument now (#49, @krlmlr).

• debugme now correctly instruments functions with NULL body
  and functions with no arguments.

• Nested calls are printed better now, with indentation (#44, @krlmlr).

• debugme() now re-reads the DEBUGME environment variable
  (#45, @krlmlr).

• New DEBUGME_SHOW_TIMESTAMP environment variable to hide timestamp
  output for reproducibility (#49, @krlmlr).

• debugme now does not change the random seed (#50).