slim down changelog to include only most recent

CHANGELOG.md

@@ -69,6 +69,7 @@
 - Adds version release documentation
 - Slightly modifies pysep-docs conda environment to accomodate converted nbooks
 
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 ## Version 0.5.0 
 - Improves functions 'read_forcesolution' and 'read_source', which now return
   `obspy.core.event.Event` objects, rather than the makeshift Source objects 
@@ -109,20 +110,14 @@
 - Removed unnused parameters 'legacy_naming' and 'log_level' from 
 	`Pysep.write_config`
 
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 ## Version 0.5.1
 
 - Bugfix: RecSec subset streams, which checked that 'st' and 'st_syn' had the same stations, would not run for streams of the same length, leading to edge case where same length streams would plot out of order because they had not been sorted. removed the criteria and now subset streams runs at all times
 
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 ## Version 0.6.0
 
-- Improved functionality for SPECFEM source file reading
-- #121: Single source versioning, improved logging, minor bugfixing
-- #123: Bugfix on RecSec amplitude normalizations
-- #124: Improved I/O for SPECFEM objects. API change RecSec name `cmtsolution` -> `source`
-- New RecSec parameter `--srcfmt` that allows user to set `source` manually
-- #126: Fixed example config file inconsistencies
-- PySEP parameter `_legacy_naming` -> `legacy_naming`
-- New RecSec parameters `obs_wildcard` and `syn_wildcard` for custom filename format.
 - #136: New read function for ASDFDataSets for misfit window plotting
 - #137: More control over RecSec kwargs and better warning messages
 - #138: Improved SAC header creation for SPECFEM synthetics