Update RELEASE_NOTES for 0.4.5

RELEASE_NOTES.md

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+Release 0.4.5
+------------------------------------
+
+### Highlights
+ * Dockerized demo with support for different Hive versions
+ * Smoother handling of append log on cloud stores
+ * Introducing a global bloom index, that enforces unique constraint across partitions
+ * CLI commands to analyze workloads, manage compactions
+ * Migration guide for folks wanting to move datasets to Hudi
+ * Added Spark Structured Streaming support, with a Hudi sink
+ * In-built support for filtering duplicates in DeltaStreamer
+ * Support for plugging in custom transformation in DeltaStreamer
+ * Better support for non-partitioned Hive tables
+ * Support hard deletes for Merge on Read storage
+ * New slack url & site urls
+ * Added presto bundle for easier integration
+ * Tons of bug fixes, reliability improvements
+
+
+### Full PR List
+
+ * **@bhasudha** - Create hoodie-presto bundle jar. fixes #567 #571 
+ * **@bhasudha** - Close FSDataInputStream for meta file open in HoodiePartitionMetadata . Fixes issue #573 #574  
+ * **@yaoqinn** - handle no such element exception in HoodieSparkSqlWriter #576  
+ * **@vinothchandar** - Update site url in README 
+ * **@yaooqinn** - typo: bundle jar with unrecognized variables #570 
+ * **@bvaradar** - Table rollback for inflight compactions MUST not delete instant files at any time to avoid race conditions #565  
+ * **@bvaradar** - Fix Hoodie Record Reader to work with non-partitioned dataset ( ISSUE-561) #569  
+ * **@bvaradar** - Hoodie Delta Streamer Features : Transformation and Hoodie Incremental Source with Hive integration #485 
+ * **@vinothchandar** - Updating new slack signup link #566   
+ * **@yaooqinn** - Using immutable map instead of mutables to generate parameters #559 
+ * **@n3nash** - Fixing behavior of buffering in Create/Merge handles for invalid/wrong schema records #558   
+ * **@n3nash** - cleaner should now use commit timeline and not include deltacommits #539  
+ * **@n3nash** - Adding compaction to HoodieClient example #551   
+ * **@n3nash** - Filtering partition paths before performing a list status on all partitions #541  
+ * **@n3nash** - Passing a path filter to avoid including folders under .hoodie directory as partition paths #548   
+ * **@n3nash** - Enabling hard deletes for MergeOnRead table type #538  
+ * **@msridhar** - Add .m2 directory to Travis cache #534   
+ * **@artem0** - General enhancements #520 
+ * **@bvaradar** - Ensure Hoodie works for non-partitioned Hive table #515  
+ * **@xubo245** - fix some spell errorin Hudi #530   
+ * **@leletan** - feat(SparkDataSource): add structured streaming sink #486   
+ * **@n3nash** - Serializing the complete payload object instead of serializing just the GenericRecord in HoodieRecordConverter #495   
+ * **@n3nash** - Returning empty Statues for an empty spark partition caused due to incorrect bin packing #510  
+ * **@bvaradar** - Avoid WriteStatus collect() call when committing batch to prevent Driver side OOM errors #512   
+ * **@vinothchandar** - Explicitly handle lack of append() support during LogWriting #511   
+ * **@n3nash** - Fixing number of insert buckets to be generated by rounding off to the closest greater integer #500   
+ * **@vinothchandar** - Enabling auto tuning of insert splits by default #496  
+ * **@bvaradar** - Useful Hudi CLI commands to debug/analyze production workloads #477  
+ * **@bvaradar** - Compaction validate, unschedule and repair #481   
+ * **@shangxinli** - Fix addMetadataFields() to carry over 'props' #484  
+ * **@n3nash** - Adding documentation for migration guide and COW vs MOR tradeoffs #470  
+ * **@leletan** - Add additional feature to drop later arriving dups #468 
+ * **@bvaradar** - Fix regression bug which broke HoodieInputFormat handling of non-hoodie datasets #482 
+ * **@vinothchandar** - Add --filter-dupes to DeltaStreamer #478 
+ * **@bvaradar** - A quickstart demo to showcase Hudi functionalities using docker along with support for integration-tests #455 
+ * **@bvaradar** - Ensure Hoodie metadata folder and files are filtered out when constructing Parquet Data Source #473 
+ * **@leletan** - Adds HoodieGlobalBloomIndex #438 
+ 
+
 Release 0.4.4
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