Get rid of wget; embrace curl

[frgomes]

I'm not sure why... but existing scripts which were working fine stopped work properly when wget is called. It may be a misconfiguration or just a bug somewhere else... but the point is that the toolbox sometimes uses wget sometimes use curl. We should use only one of those.

• [x] Replace wget by curl in files under bin folder;
• [ ] Replace wget by curl in all other files