MailArchiveExt: fixed `AttributeError`s from `environment_needs_upgrade()` with Trac 1.0

TracAvatarPlugin: replace `format_author` template method only for timeline.html to avoid crashing discussion plugin

TracAvatarPlugin: import README.txt from TracLightning

LightningTheme: added support for Trac 1.0

LightningTheme: add `svn:ignore` property

LightningTheme: removed //Translated by ...// from footer

LightningTheme: tweak styles for hover on mainnav

LightningTheme: fixed missing `#pagepath` element

LightningTheme: imported source files in Trac Lightning

TracCompleteUserPlugin: new version 0.5.0

- fixed wrong default value of `[complete-user] single_fields` option
- use config api rather than `Configuration.get*` methods
- use `add_script_data` rather than `filter_stream`
- use db api to avoid SQL injection

NewWikiPageButton: refactored

- bump up the version to 1.1.0
- transfer newwikipagebutton.js file by Trac core rather than Genshi template rendering
- use `type=submit` instead of `type=button` in order to use styles
- removed unused imports
- removed unused files

ReportIncludePlugin: bumped up the version to 0.6 and made it PEP-440 compatible version string

ReportIncludePlugin: fixed not working with Trac 1.0

TracSteinsChartPlugin: fixed breakages with Trac 1.0 due to using internal methods

TracSteinsChartPlugin: fixed upgrade failing with PostgreSQL

GanttCalendarPlugin: bumped up the version to 0.6.4

GanttCalendarPlugin: fixed an `TypeError` while comparing `due_assign` and `due_close` values (closes #34514)

GanttCalendarPlugin: fixed wrong label in table of the gantt view

GanttCalendarPlugin: avoid `KeyError: 'custom'` in `/ticketgantt` page

GanttCalendarPlugin: show datepicker for text field of holiday if Trac 1.0 or later

GanttCalendarPlugin: follow-up to r852, fixed missing `pkg_resources`

GanttCalendarPlugin: removed compiled message catalogs

GanttCalendarPlugin: fixed a `KeyError` if locale directory doesn't exist, e.g. egg file built without Babel

GanttCalendarPlugin: bumped up the version to 0.6.3

GanttCalendarPlugin: tweaked `setup.py` and make it executable

GanttCalendarPlugin: refactored `admin.py` and use Trac db api since 0.12

GanttCalendarPlugin: use iso8601 format for `holiday.date` column

GanttCalendarPlugin: allow sorting with any field in gantt chart (sf.jp #34214)

GanttCalendarPlugin: file names of template have `ganttcalendar_` prefix

GanttCalendarPlugin: simplify verbose code