Apply Apache v2.0 License (NOAA-OWP#272)

* apply Apache v2.0 license

* update superpackage classifier

* bump super package to 3.0.0

* bump nwm client to 9.0.0

* update nwm client classifier

* update all major package versions

* update license classifiers and minimum ht depends versions

* add NOTICE file with government statement

* add symlinks to NOTICE

* add NOTICE to manifest of superpackage

* bump minimum python version for superpackage due to metrics compatibility

Update nwm docs (NOAA-OWP#270)

* update nwm client docs

* update version

Update HT super package dependencies (NOAA-OWP#266)

* lock versions of compatible subpackages, bump to 2.3.0

* remove deprecated packages add svi client

* ignore deprec packages

* update citation

Merge pull request NOAA-OWP#194 from jarq6c/release_223

HydroTools Superpackage Release 2.2.3

bump nwm_client version to 5.0.1.post1

Merge pull request NOAA-OWP#165 from jarq6c/ht-update

Advance Superpackage to 2.2.2

switch to nwm client in metapackage

Merge pull request NOAA-OWP#119 from jarq6c/update_versions

Update minimum versions

add nwis_test to check DeprecationWarning raised

Merge pull request NOAA-OWP#89 from jarq6c/update-events

Update event detection docs with tips. Passed all tests.