- use std::string in Draw_String & co
- add pyramid test

cleanup

take socket name on command line

- usleep takes microseconds
- work on c solver interf

"pure windows" version (without cygwin) is almost there: the solver
interface now works quite nicely using native Windodiows sockets and
the timers work too. There are still some bugs with binary files and
user-created functions in the parser.

replaced poll() with direct call to select(). This should help in getting
the solver interface eventually work on Windows without cygwin

added example of interactive command line driver for Gmsh

- rename CLIENT_VIEW into CLIENT_MERGE_FILE
- new CLIENT_PARSE_STRING

a little more work on the axes stuff: enable global axes for the geometry and
the mesh, too. We can finally get rid of the ugly old "moving axes" bit.

(+ reverted changes in unproject: need to be more careful since unproject
can be called outside Draw())

don't need the extra options anymore

simpler Start() function

typo

- fixed the "unix socket name is one character short" problem on
MacOS and AIX. Unfortunately, this required the client code to be
slightly modified as well (and as a consequence, old versions of getdp
will for example not work with new versions of Gmsh on MacOs and
AIX). But it's better to do things "the right way" (TM) for people who
want to connect using different languages (Perl, Python).

- moved the GmshServer stuff in its own class

- added missing rules in parser makefile (so that the parser gets
  rebuilt automatically when one changes Gmsh.y or Gmsh.l)

use C++ example in doc instead of C

build solver examples with ${FLAGS}, so that on Windows they receive the
-mwindows argument

small cleanup

reorganized solver directory + added c++ solver example