Mailplane 2.1.5 released

Release notes:

• NEW: Support for the new and fast Gmail "separate" windows (more information).
• FIX: PDF menu item wasn't created on Mailplane installation
• FIX: Growl notifications didn't open in the main window when the main window was hidden.
• FIX: Adobe Flash 10.1 beta 3 prevented attachments uploads.
• FIX: Memory leak when using drag and drop
• FIX: Inbox or separate window could become grey after a drag and drop operation
• FIX: Initial URL for Gmail didn't always have the correct scheme
• FIX: Separate window didn't close after archive, delete, or report spam.
• CHANGE: Removed custom WebKit nightly frameworks as the Google has fixed the "duplicating chat box" problem.
• FIX: open location in AppleScript didn't work
• FIX: Typo in help menu