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Doc - 3.4 Highlights (#6404)

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Documentation/Books/Manual/Highlights.md
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@ -4,6 +4,44 @@ Highlights
Version 3.4
-----------
**All Editions**
- [**ArangoSearch**](Views/ArangoSearch/README.md):
Search and similarity ranking engine integrated natively into ArangoDB and
AQL. ArangoSearch combines boolean retrieval capabilities with generalized
ranking algorithms (BM25, TFDIF). Support of e.g. relevance-based searching,
phrase and prefix-matching, complex boolean searches and query time relevance
tuning. Search can be combined with all supported data models in a single
query. Many specialized language analyzers are already included for e.g.
English, German, French, Chinese, Spanish and many other language.
- [**GeoJSON Support**](../AQL/Functions/Geo.html) and
[**S2 Geo Index**](Indexing/Geo.md): ArangoDB supports now all geo primitives.
MultiPoint, MultiLineStrings, MultiPolygons or intersections can be now
defined and queries for. New Google S2 geo index is optimized for RocksDB and
enables efficient querying. Geo query results are automatically visualized
with an OpenStreetMap integration within the Query Editor (ArangoDB WebUI)
- [**Query Profiler**](../AQL/ExecutionAndPerformance/QueryProfiler.html):
Enables the analysis of queries and adds additional information for the user
to identify optimization potentials more easily. The profiler can be accessed
via Arangosh with `db._profileQuery(...)` or via the *Profile* button in the
Query Editor of the Web UI.
- [**Streaming Cursors**](../AQL/Invocation/WithArangosh.html#setting-options):
Cursors requested with the stream option on make queries calculate results
on the fly and make them available for the client in a streaming fashion,
as soon as possible.
- **RocksDB as Default Storage Engine**: With ArangoDB 3.4 the default
[storage engine](Architecture/StorageEngines.md) for fresh installations will
switch from MMFiles to RocksDB. Many optimizations have been made to RocksDB
since the first release in 3.2. For 3.4 we optimized the binary storage
format for improved insertion, implemented "optional caching", reduced the
replication catch-up time and much more.
Also see [What's New in 3.4](ReleaseNotes/NewFeatures34.md).
Version 3.3
-----------