Add support for `notmuch_database_get_all_tags`
+Go Bindings
+-----------
+
+Go bindings moved to contrib
+
+Add support for `notmuch_threads_t` and `notmuch_thread_t`
+
+Fixed constant values so they are not all zero anymore.
+
+ Previously, it was impossible to open writable database handles,
+ because DATABASE_MODE_READ_ONLY and DATABASE_MODE_READ_WRITE were
+ both set to zero.
+ The same issue occured with sort modes.
+
Notmuch 0.22.1 (2016-07-19)
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