Extended package status page (#76)

* implement log storage at backend
* handle process id during removal. During one process we can write logs from different packages in different times (e.g. check and update later) and we would like to store all logs belong to the same process
* set package context in main functions
* implement logs support in interface
* filter out logs posting http logs
* add timestamp to log records
* hide getting logs under reporter permission

List of breaking changes:

* `ahriman.core.lazy_logging.LazyLogging` has been renamed to `ahriman.core.log.LazyLogging`
* `ahriman.core.configuration.Configuration.from_path` does not have `quiet` attribute now
* `ahriman.core.configuration.Configuration` class does not have `load_logging` method now
* `ahriman.core.status.client.Client.load` requires `report` argument now

docs/ahriman.core.log.rst

@@ -0,0 +1,37 @@
+ahriman.core.log package
+========================
+
+Submodules
+----------
+
+ahriman.core.log.http\_log\_handler module
+------------------------------------------
+
+.. automodule:: ahriman.core.log.http_log_handler
+   :members:
+   :no-undoc-members:
+   :show-inheritance:
+
+ahriman.core.log.lazy\_logging module
+-------------------------------------
+
+.. automodule:: ahriman.core.log.lazy_logging
+   :members:
+   :no-undoc-members:
+   :show-inheritance:
+
+ahriman.core.log.log module
+---------------------------
+
+.. automodule:: ahriman.core.log.log
+   :members:
+   :no-undoc-members:
+   :show-inheritance:
+
+Module contents
+---------------
+
+.. automodule:: ahriman.core.log
+   :members:
+   :no-undoc-members:
+   :show-inheritance: