Update Geary Mail to the latest stable release. Updates include:

• Major redesign of email composer, now presented inline in main window
• Composer will automatically add signature to emails
• Saving drafts to server can be disabled
• Improved interface, now using GtkHeaderBar and modern widgets
• Database speed optimizations to reduce lags and improve read times
• Improved connection handling and reestablishment
• Show attachments lacking a Content-Disposition
• Important bug fixes
• Updated translations
• Warn user of TLS certificate issues when connecting (#713247)
• Better scrolling system for inline composer
• Improved database performance and reduced lags
• IMAP stack fix (old IDLEs causing command completion)
• Compile with Vala 0.25 and better
• Updated translations