Update version to 2.5.4 and release
Mail folder extentions
Merge commit '305839c6b9d01d6f05e7a294b3417a97e7623ee6'
Add find in batches support
Add support for retrieving light weight entries
Improved find entries
More find in batches
Add sync attributes to email messages
Documentation
Add body she
Allow retriever connection reuse
Add search criteria to find folders
Resilient IMAP connections
Remove debug info
Ensure imap connection is disconnected
Merge pull request #1 from mystichacker/develop

Ensure imap connection is disconnected
Merge pull request #2 from market76/develop

Improved receiving