Added bullets to 3.5.3 in the NEWS

NEWS

 New in 3.5.3:
 
-Improvement: After three long, hard years... we know how to upgrade
-Bug Fix: #expiring_url returns 'missing' urls if nothing is attached
-Improvement: Lots of documentation fixes
-Improvement: Lots of fixes for Ruby warnings
-Improvement: Test the most appropriate Ruby/Rails comobinations on Travis
-Improvement: Delegate more IO methods through IOAdapters
-Improvement: Remove Rails 4 deprecations
-Improvement: Both S3's and Fog's #expiring_url can take a Time or Int
-Bug Fix: Both S3's and Fog's expiring_url respect style when missing the file
-Bug Fix: Timefiles will have a reasonable-length name. They're all MD5 hashes now
-Bug Fix: Don't delete files off S3 when reprocessing due to AWS inconsistencies
-Bug Fix: "swallow_stream" isn't thread dafe. Use :swallow_stderr
-Improvement: Regexps use \A and \Z instead of ^ and $
-Improvement: :s3_credentials can take a lambda as an argument
-Improvement: Search up the class heirarchy for attachments
-Improvement: deep_merge options instead of regular merge
-Bug Fix: Prevent file deletion on transaction rollback
-Test Improvement: Ensure more files are properly closed during tests
-Test Bug Fix: Return the gemfile's syntax to normal
+* Improvement: After three long, hard years... we know how to upgrade
+* Bug Fix: #expiring_url returns 'missing' urls if nothing is attached
+* Improvement: Lots of documentation fixes
+* Improvement: Lots of fixes for Ruby warnings
+* Improvement: Test the most appropriate Ruby/Rails comobinations on Travis
+* Improvement: Delegate more IO methods through IOAdapters
+* Improvement: Remove Rails 4 deprecations
+* Improvement: Both S3's and Fog's #expiring_url can take a Time or Int
+* Bug Fix: Both S3's and Fog's expiring_url respect style when missing the file
+* Bug Fix: Timefiles will have a reasonable-length name. They're all MD5 hashes now
+* Bug Fix: Don't delete files off S3 when reprocessing due to AWS inconsistencies
+* Bug Fix: "swallow_stream" isn't thread dafe. Use :swallow_stderr
+* Improvement: Regexps use \A and \Z instead of ^ and $
+* Improvement: :s3_credentials can take a lambda as an argument
+* Improvement: Search up the class heirarchy for attachments
+* Improvement: deep_merge options instead of regular merge
+* Bug Fix: Prevent file deletion on transaction rollback
+* Test Improvement: Ensure more files are properly closed during tests
+* Test Bug Fix: Return the gemfile's syntax to normal
 
 New in 3.5.2: