Sysrepo

Sysrepo version 0.7.4 features following improvements:
- released mainly so that new libyang with data tree optimizations can be used
- new build constants to enable basic performance tuning
- `FILE_FORMAT_EXT` default `xml`, can be changed to `json` to improve performance
- `GET_ITEMS_FETCH_LIMIT` default `100`, can be increased to improve performance of corresponding functions for huge data trees
- `GET_SUBTREE_CHUNK_CHILD_LIMIT` default `20`, can be increased to improve performance of corresponding functions for huge data trees
- many complex module dependencies fixed
- many bugfixes and minor improvements

This release depends on libyang ([v0.15-r1](https://github.com/CESNET/libyang/releases/tag/v0.15-r1))

Sysrepo version 0.7.3 features following improvements:
- possibility to uninstall more modules in one command with `sysrepoctl` for cases when several modules are dependent on each other (was impossible to uninstall before),
- several bugfixes

This release depends on libyang ([v0.14-r1](https://github.com/CESNET/libyang/releases/tag/v0.14-r1)) (the same as version 0.7.2).

Sysrepo version 0.7.2 features following improvements:
- new functions `sr_realloc_values()` & `sr_realloc_trees()`
- large number of bugfixes
- various resolution problems fixed
- incorrect path usage fixed

This release depends on libyang ([v0.14-r1](https://github.com/CESNET/libyang/releases/tag/v0.14-r1)).

Sysrepo version 0.7.1 features following improvements:
* several important bugfixes and optimizations

This release depends on libyang ([v0.13-r2](https://github.com/CESNET/libyang/releases/tag/v0.13-r2)).

Sysrepo version 0.7.0 features following improvements:
* full NACM support
* (X)Paths for subscriptions unified - more information in the documentation page Developer Guide/Path Adressing
* candidate datastore changes - session-exclusive, NACM normally checked
* `sr_commit` functionality change - now simply checks NACM and then applies uncommited session changes to be visible to all the sessions (exception for candidate datastore), it does not perform NETCONF commit anymore
* many bugfixes and enhancements

This release depends on libyang ([v0.13-r1](https://github.com/CESNET/libyang/releases/tag/v0.13-r1)).

Sysrepo version 0.6.0 features following improvements:

* event Notifications replay
* support for restoring lost connections (`sr_session_check()`)
* better support for anyxml/anydata (`SR_ANYXML_T and SR_ANYDATA_T`)
* `sr_get_submodule_schema()` to retrieve YANG submodule
* clarified schema status (imported vs implemented)
* removed `init` operation from `sysrepoctl`
* added merge option and XPath support in `sysrepocfg`
* `sysrepocfg` filtering
* whole module notification subscription
* templates for issues and pull requests
* defined versioning policy
* defined coding style policy
* updated language bindings with unit tests
* version validation on connection
* large number of bug fixes

This release depends on libyang ([v0.12-r2](https://github.com/CESNET/libyang/releases/tag/v0.12-r2)).