Fixed bug originated by wrong handling of flow option for thermal lag.
Reversed output arguments of profile identification function and adapted related code.
Small coding improvements in polygon triangulation interface mex function.
Changed flow speed polynomial coeffients as discussed in CTD workshop (Geesthacht, October 2013).
Improved thermal lag related code and added example ctd data files:

  * Use central difference in minimization.

  * Restrict area computation to common density range.

  * Added example code using sample files in private/test.
Added support for dynamic sensor lag parameters for sequences with variable flow speed.
Cosmetic fix in documentation comment of NetCDF reading function.
Insignificant cosmetic improvements in legacy note of several functions.
Merge branch 'develop'