[doc] Update Changelog for 1.1

Author: Wentzell

doc/ChangeLog.md

@@ -2,6 +2,38 @@
 
 # Changelog
 
+This is version 1.1.0 of h5, a high-level C++ interface to the hdf5 library.
+
+We thank all contributors: Daniel Bauernfeind, Alexander Hampel, Henri Menke, Dylan Simon, Nils Wentzell
+
+Find below an itemized list of changes in this release.
+
+### General
+* Allow creation of softlinks
+* Fix logic error in test/python/archive.py
+* Make test on byte buffer less stringent, compare only archive contents for memory files
+* Minor correction in error msg when constructing HDFArchiveGroup as as new memory file
+* Add function as_bytes to HDFArchive class and extend the wrapped File class as necessary
+* Allow creation HDFArchive as a memory-file only
+* Consistently use std::byte instead of char for memory files
+* Merge memory file into file class, expose byte constructor to Python + tests
+* Allow type conversions in h5_read, but issue warning FIX #7
+* Allowed custom key class in reading/writing of a map. (#5)
+* Cleanup unnecessary hdf5.h include in h5_complex test
+* Minor correction in h5_read doc for array and vector
+* Consistently use header guards over pragma once
+
+### doc
+* Add link to reference doc to README.md
+* Minor doc cleanups for doxygen generation, add Doxyfile and update .gitignore
+
+### cmake
+* Bump Version number to 1.1.0
+* Set CXX standard using target_compile_features
+* Bump version requirement to 3.13.5
+* Provide a namespaced alias for the python modules
+
+
 ## Version 1.0.0
 
 h5 is a high-level C++ interface to the hdf5 library, which