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Merge branch 'master' of github.com:barentsen/iphas-dr2

* 'master' of github.com:barentsen/iphas-dr2:
  More tidying
  removing strange duplication of tex
  Spell check
  Adding to .bib file
  Updated caption to Fig 13
  Detailed applications
  finally (30,0)
  Now (45,2)
  Comment on (180, 3)
Improves sections 6-7