Imrpoved readme and doc_outline
Added testfile & testfile.meta to gitignore
A little improvement to the classes

Added one more attribute for the data -- *data.name*;
rewrote the iteration over the variables in the dydata.frame -- that's the way to go.

In fact, namings seem to be ok.
But the code is messy and crumbled.

TODO:
     Have to specify better the abstraction of the objects in the code: dyvar and dydata.frame.
     And all the 'action' code (printing.. blahblah) will get simpler and coherent.

Better object abstractions require better R knowledge..
Now all the almost-abstractions are done with named arrays of strings.
Data object description is ok, done with named arrays of strings. Alighned the code to it. But there are some issues with neat dyda.var and dyda.data assignment. Also minor TODOs...errors, tests, hiding stuff (true abstraction, as much it is possible in R)
Fixed issue with inconsistent, manual dyda.var, dyda.data assignment
Unified dyda.var and dyda.data handling with a couple of abstract dyda functions. Made a couple of useful dyda-comparison functions for future -- didn't test them. Nothing is unified for printing
Fixed README (decent state) and improved doc_outline (some parts are still old and stupid)