Miscelaneous remarks

[Bonnarel]

For authors : I gave a couple of typos/remarks/suggestions on the text to Mireille.
Maybe one of them is interesting for Jesus to check

[loumir]

• changes in the 2MASS filter example / listing appendix D3.
  MIVOT syntax is validated wrt the MIVOT XML Schema.
• typos corrections VO/DML --> VODML