Description

Updates style and front page info to explain version caps for pandas, etc.

Checklist:

Release candidate for version 0.1.3:

[x] Update the version number
[x] Verify and update Zenodo information in .zeondo.json
[x] doc tests pass locally - no docs yet
[x] activate this branch on readthedocs - no RTD integration yet
[x] Upload the test distribution to the testPyPi server -- https://test.pypi.org/project/pysatSeasons/0.1.3rc1/
[x] Contacted developers and users about the future release
[na] Performed integration tests with downstream packages (include list of these packages)
[x] Create a wiki page with the release text - https://github.com/pysat/pysatSeasons/wiki/v0.1.3
[x] After approval, confirm all changes from the RC pull are listed in the wiki release text.
[x] My code follows the style guidelines of this project
[x] I have performed a self-review of my own code
[x] I have commented my code, particularly in hard-to-understand areas
[x] I have made corresponding changes to the documentation
[x] My changes generate no new warnings
[x] I have added tests that prove my fix is effective or that my feature works
[x] New and existing unit tests pass locally with my changes
[x] Any dependent changes have been merged and published in downstream modules
[x] Add a note to CHANGELOG.md, summarizing the changes