Release 2.1.0c of 21may10:

- bugfixes, among them:
  - let op ignore data files
  - set weight to lin if data have no error bars
  - 'msa'  got wrong x for groups of size 1
  - error propagation for vectorial arguments
- internal changes:
  - simplify index.cpp, removed test mode, remove unused IndexList

Release 2.1.0b of 15may10:

- fix bugs introduced by release 100511:
  - enable ody
  - repair oio when nJ=1
  - oy was setting nonsense dy when expr yielded no error
  - severe errors in error handling within expr

Release 2.1.0a of 11may10 (including new frida2lib release):

- fix bug in configure.ac introduced in previous release
- new release numbering scheme:
    2 : Frida implementation
    1 : increases when established usage changes
    0 : increases when new functionality is added or major bug is fixed
    a : increases with minor improvements or bug fixes

Release 100511:

- new functionality:
  - error propagation now working for 'm' and 'ox', 'oy', .. operations
  - '\wh' meta command: write history, using GNU history
  - 'mpaea', 'mpaer': binning that keeps error bars below given bound 
  - 'ge': switch error bar plotting on/off
  - 'cr': set restrictions for fit range
- changes in user interface:
  - curve evaluation expression: now c[]() instead of f[]()
  - 'mdy-' removed: to suppress error bars, now use oy y+-0
- improvements in behavior:
  - suppress menu when answer is already given (oio, ..)
  - do not leave calc mode on error
- bugfixes:
  - bugfix in plot axis rounding
  - bugfix mfj: z coordinates, rPar
  - fix "g" and "m" explanations
  - fix as-on-disk indicator
- internal changes (major code refactoring):
  - online memory and z-entry main vector now based on shared_ptr
  - sources split (olf/mem, opr/special1, dualplot/axis)
  - scan and parts of curve now unified in zentry
  - reduce .h dependencies (keyword "class"; move implementation to .cpp)
  - revise exp.cpp thoroughly
  - purge and simplify macro engine; separate meta commands and macros

Release 100429:

- new functionality:
  - 'gd' restore gnuplot dialog (request by Fanni)
- bugfixes:
  - repair several little bugs discovered during JCNS data analysis school
  - correct frida.ini location
- internal changes:
  - function names -> "clear", "remove" for compatibility with STL

Release 100424:

- changes in user interface:
  - get rid of dmake, automake compiles frida.pod
  - make install now installs man page and aux files (/usr/local/share/frida)
  - executable renamed frida2 -> frida
- bugfixes:
  - correct file_in (xcoord was reread as ycoord)
- improvements in behavior:
  - improve "df"

Change log started 7apr10