Keep the cached cdipdir value after it's checked, and reuse it if it …

…exists, rather then fetching the same value several times

Version bump to 1.7.27 for support of new moments_3d outputs for ERG …

…data, removal of obsolete THEMIS variable options, and optional conversion of MMS qflux and ptens moments to SDC-compatible units.

Version bump to 1.2.26, for new heat flux moments

Version bump to 1.7.25, to pick up HAPI fillval and download() timeou…

…t updates

Move MMS data_rate_segments test to top of script for quick feedback …

…on bug fix

Bump pyspedas version to 1.7.24

Bump pyspedas to version 1.7.23, to pick up THEMIS L2 EFP and EFW sup…

…port

Version bump to 1.7.21 for HAPI bug fix

Removed obsolete reference to flatten, which hasn't worked for a long…

… time

Use raw string to avoid warning about invalid escape character "\s"