Update for full release and slight changelog change (#4424)

### Changed

- Updated the FileList object to handle files that do not contain a trailing new line character. [#4372](https://github.com/USGS-Astrogeology/ISIS3/pull/4372)

- Refactored Blob class to be used by classes that serialize to a Cube instead of inherited from. Impacted classes are GisBlob, History, ImagePolygon, OriginalLabel, OriginalXmlLabel, StrethBlob, StringBlob, and Table. [#4082](https://github.com/USGS-Astrogeology/ISIS3/issues/4082)

- Fixed hi2isis MRO:ADC_TIMING_SETTINGS label conversion issue [4290](https://github.com/USGS-Astrogeology/ISIS3/issues/4290)

- Changed csv2table to identify headers with arrays and create table fields as arrays instead of single fields for each element [3676](https://github.com/USGS-Astrogeology/ISIS3/issues/3676)

## [4.4.0] - 2021-02-11

# Other release information

string(TIMESTAMP VERSION_DATE "%Y-%m-%d" UTC)

set(RELEASE_STAGE             "beta") # (alpha, beta, stable)

set(RELEASE_STAGE             "stable") # (alpha, beta, stable)

# Define to the address where bug reports for this package should be sent.

set(PACKAGE_BUGREPORT  "https://github.com/USGS-Astrogeology/ISIS3/issues")

#       A Public Release for ISIS3.6.1:                        {% set version = "3.6.1" %}

#       A Release Candidate for ISIS3.6.1:                     {% set version = "3.6.1_RC" %}

#       A custom build of ISIS3.6.1 for the CaSSIS mission:    {% set version = "3.6.1_cassis" %}

{% set version = "5.0.0_RC1" %}

{% set version = "5.0.0" %}

# This is the build number for the current version you are building. If this is the first build of

# this version, the build number will be 0. It is incremented by 1 with every consecutive build of