It is called "flex" atm but it is subject to change.

Also, remove redundant goto_starts

It was trying to parse a position instead.

Add the tagset-symbol-getter operator (GetSymbols), bump required Corpus2 version to 1.0.2 since new features are needed.

It is more intuitive that way, e.g. equal(2,3) is never true, equal(3,3) is always true.
Nowhere is only equal to Nowhere, and Begin or End are equal to nonspecial positions
depending on current position in the sentence context.

Added parentheses for all "general" operator rules (string_operator, bool_operator, symset_operator and position_operator).

'unify the names of the rules').

This has to be done explicitly for Windows and I think doesn't hurt for Linux.
It doesn't find the dependencies on Win, may be because we're still building
STATIC there, tho I'm not sure if DLLs wouldn't have this problem, either.