Bugfix Collection for v0.6.4 (One ZIP file)

Until v0.7 is released, here is a collection of bug fixes that address all of the major issues that we have found in 0.6.4.  Just unzip and overwrite the existing files.  Hopefully this will help a few people out until the next release is stabilized.

include/url.php:
* Lines 13-18: Fix URL aliases when installed to a subdirectory

catalog/module/review.php:
* Lines 32-33: Prevent error message when no reviews are written

catalog/plugin/account_success.php:
* Lines 19-20: Ensure that customer is brought to checkout page when continuing

catalog/plugin/checkout_process.php:
* Lines 107-109: Suppress mail errors so customer sees the order was successful

catalog/plugin/review_write.php:
* Lines 19-20: Don't check for posted "author" value because it's never used
* Lines 29-32: Fixed database insert query

catalog/template/default/module/review.tpl:
* Line 7: Remove absolute path to "write a review" image (for subdirectory installs)

include/cart.php:
* Lines 124-125: Prevent negative quantities

include/database.php:
* Lines 18-19: Ensure that magic_quotes_gpc is off rather than on

admin/plugin/category.php
* Lines 88-89: Adjusted search SQL to include more than just exact matches

admin/plugin/product.php
* Lines 129-130: Adjusted search SQL to include more than just exact matches

admin/plugin/option.php
* Lines 75-76: Adjusted search SQL to include more than just exact matches

admin/plugin/image.php
* Lines 106-107: Adjusted search SQL to include more than just exact matches

admin/plugin/review.php
* Lines 82-83: Adjusted search SQL to include more than just exact matches
* Lines 82-83: Replaced nonexistent column 'r.name' with 'r.author'

admin/plugin/information.php
* Lines 88-89: Adjusted search SQL to include more than just exact matches

admin/plugin/order.php
* Lines 100-101: Adjusted search SQL to include more than just exact matches
* Lines 100-101: Replaced entire SQL query; it didn't even search for orders

admin/plugin/customer.php
* Lines 92-93: Adjusted search SQL to include more than just exact matches

admin/plugin/user.php
* Lines 87-88: Adjusted search SQL to include more than just exact matches

catalog/plugin/search.php
* Lines 27-31: Adjusted search SQL to include more than just exact matches

Many Thanks! I have released another version with your fixes.