Features:

• Improved interface generator handling of multiple uppercase letters
  sequences. For example, ACTIVATE_CONNECTION would before be converted
  to a_c_t_i_v_a_t_e__c_o_n_n_e_c_t_i_o_n and after to activate_connection.
  (reported by @bhattarabi)
• Improved python formatting generated by interface code generator.
• Added option --block to generate blocking interface code.
  (requested by @zhanglongqi and @MathisMARION)

Fixes:

• Fixed docstrings still being present even if python was configured with
  --without-doc-strings.
• Fixed interface generator crashing when a rare write-only property is
  encountered. (reported by @gotthardp)
• Fixed async interfaces iterating over all members during initialization.
  (reported by @gotthardp)
• Fixed TypeError: Dbus type '\x00' is unknown being raised when trying to read
  from a message more than one time. (reported by @IB1387 and @asmello)
• Fixed missing class body when generating code for interface without members.