Fix #41: Gitweb import failed finding parent refs

Make sure API uses raw config_get.

Fix #33: Fix OOM when deleting large repositories ...

Rather than having the delete process first load all changesets for the repo,
and then delete files for each individual changeset,  replace this method with
a single DB query that handles all file deletion with a subquery.

Allow branch names containing a period.

Fix #34: GitHub integration import failures.

Fix #39: Look for exact repository name before using wildcards. ...

This modifies SourceRepo::load_by_name() to look for a repositoyr with the
exact name given first, and then fallback onto the old method of looking for
a repo that simply contains the given name.  This both addresses the problem
and maintains compatibility with the existing behavior and/or expectations.

Fix #40: Modify history parsing to extract filenames with spaces.

Improve performance on large repositories.

Allow repo statistics to be disabled.

Fix #29: Fix potential OOM situations with Git imports.

Fix #30: Gitweb integration did not properly parse multiple parent commits.

Fix #32: XL columns should not have default values.

Issue #28: More copyright updates.

Fix #28: Updated copyrights from '20081 to '2008-2009'

Fix #26: Ported issue #23, option to define path to SVN binary.

Fix incorrect form security strings.

Fix #27: Use a more permissive regex for extracting commit username.

Fix #25: Was not initializing the filter for user_id.

Fix #23: Allow configuration of the SVN binary path.

Fix #22: Make sure bugs exist before trying to update/resolve them.

Fix #21: Changed to using $X style placeholders in message template.

Fix #20: Implemented adding bugnotes for fixed bugs.

Issue #20: Added configuration settings for enabling and setting bug fixed messages.

Fix #18: Added configurable threshold for setting vcs username.

Isue #18: Added unique index to enforce username constraint.

Issue #18: Initial implementation of user-vcs name associations.

Fix #19: Display committer information if different from author information. ...

Moved author and committer display to ViewAPI functions.

Fix bug introduced by issue #14 for SVN full imports.

Fix #15: bug in ViewAPI's parameter handling.

Fix #5: Created template for Git's post-receive hook to initiate checkin with Mantis.