Update JS behavior to use portable jQuery methods

Fix #126: Sort SVN changesets by numeric revision ...

To better handle merged SVN repositories, it is necessary to retrieve
the latest changeset from the database based on integer revision number
rather than by timestamp.  This will prevent an "infinite loop" of
repeatedly importing the same changesets in cases where the latest
revisions were actually committed before earlier changesets.

Using ANSI SQL's `CAST(? AS DECIMAL)` as it seems to be compatible with
the most database platforms.

Fix #129: Set default table collation to utf8

Add a bit of debug output for SVN imports/checkins

Fix #122: Implement method to edit changeset data ...

Enhances the existing update method for porting status with a full edit
page allowing the user to update the following changeset data:

- Author's user ID
- Committer's user ID
- Changeset branch
- Porting status
- Commit message

Also fixes an issue where users without update access can still see the
dropdown and update form for porting status.

Refactor loading changesets from database rows ...

This both simplifies the codebase by reducing duplication, and also
fixes a bug where the committer info was never loaded from the database
rows because the load_* methods had never been updated with the
appropriate row/property setters.

Added named link to changeset rows for hyperlinks

Hook changeset linking later in page load

Reimplemented changeset linking; version increment

Added 6th commit note parameter for changeset ID

Implemented selectable fixed issue assignment

Fix #121: Configurable bug fixed status change

Fix #120: Only check auth if not valid remote

Fix #117: Replace language string joins

Fix #118: Improper layout checks when viewing

Fix #109: Add option to use Windows start command

Fix #114: lingering t_bug_data

Require base SVN plugin for SFSVN/WebSVN ...

Due to the fact that both plugins need to ensure that the base SourceSVN
plugin class is available, and to make sure the base configuration
options are registered, the SourceSVN plugin needs to be installed.

Re-licensed the project under the MIT license

Fix #101: Allow importing of all repos via id=all ...

Reworked import processing to allow passing id=all to the GET query
instead of a numeric Repo ID.  With this argument, the system will
automatically run the "import latest" for all repositories configured
for source integration.  This will simplify the process for keeping a
large number of repositories up to date via cron job.

Cleaned out output from repository import to look nicer, and support an
eventual UI option to import latest from all repos.

Fix #99: Use svn_binary in svn_check

Fix language string to mention correct SVN version

Fix #86, #94: Added SVN command argument configs ...

Extended the SVN configuration section to include a checkbox for
trusting SSL certificates, as well as a generic textbox to specifying
additional command arguments to the SVN binary.  Together, these two
options should allow repositories to be imported via HTTPS/SSL, as well
as additional flexibility for system admins.

Issue #97: SVN configuration uses new Source API

Fix #97: Refacter core SVN into shared codebase ...

Created base SVN plugin with the shared SVN code from WebSVN and SFSVN
plugins, and then modified the previous plugins to inherit from the new
base plugin.  This will end the previous need to constantly replicate
changes between the two SVN plugins.

Currently, the only way to modify shared SVN configuration is to have
the base SVN plugin installed, but this is a task for a different
commit.

Fix #96: Allow vcs integration configuration hooks

Fix #95: Imcomplete event API changeover

Fix #92: Unable to set SVN path on Windows ...

Refactored SVN binary/path validation into a separate function, and use
the new validation routines from the existing API and page code.

Fix #62: Remove pass-by-reference for PHP 5.3+

Fix #61: Replace deprecated split() with explode