Depolarization draft docs.

Adding depol in the docs.

Typos and small changes to HOI page.

Initial description about the handbook if instruments.

Merge from 62:f5bf7a56ffd6

Added tag v3.1 for changeset e3ff7af1d97e

(0) -30 -10 -6 +6 +10 +30 tip

mercurial