Perceval

** New features and improvements: **

* New set of backends added:
- Phabricator
- Redmine
* Add support for creating PyPi packages

** Backend improvements: **

* **jira**
- fetch additional information about custom fields
* **mediawiki**
- add a flag which ignores the MAX_RECENT_DAYS constraint when the
backend is tested

** Bugs fixed: **

* Cache tests for Redmine backend checked the values retrieved from the
repository but not from the cache.
* Timestamps generated to fetch data from a given date included invalid
timezone information for Mediawiki API (>=1.27). It only works with Zulu
dates. (54)
* Date strings that included information after the timezone were not parsed:
`Thu, 14 Aug 2008 02:07:59 +0200 CEST`. (57)

** New features and improvements: **

* New set of backends added:
- Bugzilla (REST API)
- Confluence
- Discourse
- Gmane
- Jenkins
- Kitsune (Mozilla)
- Mediawiki
- Pipermail
- ReMo (Mozilla)
- Supybot
- Telegram
* The origin of the fetched data is configurable.
* Unit tests for GitHub, Jira and Stack Exchange were added. Other tests
were added and improved. Now, the unit tests framework covers a 83% of
the source code.

** Backend improvements: **

* **gerrit**
- support server version 2.8
* **git**
- filtering by branches
- so far, the full log was read before parsing it; now, it is parsed and processed
while is being read
* **github**
- full control of GitHub API rate limit
- the program can be sent to sleep until the rate limit is reset again
* **mbox**
- fetches messages since a given date
* **pipermail**
- fetches messages from a *mod_mbox* interface (i.e: Apache)

** Bugs fixed: **

* Dates that included parentheses sections were not parsed:
`2005 15:20:32 -0100 (GMT+1)`.
* An encoding error was raised when `version.py` module was imported. (32)
* The call in chain of functions `utcnow()` and `timestamp()` from the
module `time`, produced wrong timezones on the GitHub backend.
* Action IRC messages (leading with a single `*`) were ignored. (48)
* The `backoff` field received in a Stack Exchange API response was
ignored. When this field is set, any client must wait the number of
seconds specified on it before sending any new request.
* The query used in Gerrit to retrieve the reviews was badly formed when
the blacklist filter contained two or more reviews. (50)

** New features and improvements: **

* Supports Python 3.4 and newer versions.
* Fetches and caches information from several software repositories:
- Bugzilla
- Gerrit
- Git
- GitHub
- Jira
- MBox
- Stack Exchange
* Metadata fields are added to fetched items.
* Dates and times used to request data are always converted to UTC.
* Unit testing framework is available. Currently, these
unit tests cover the 62% of the source code.

** Bugs fixed: **

* Some Git commit log entries may not contain information about files.
Before this was fixed, Perceval raised an exception with a "_Unexpected
end of log stream_" message. (8)
* Empty Git commit logs raised erros when were parsed. (17)
* Character ^M) produced some parsing errors in the Git backend. (21)