GNU style for acc.c
[FIX] Fixed the failure to build Amethyst, and renamed tccelf.c to accelf.c.

In particular, there were linker errors (undefined references) to
several function including sym_find, sym_find2, sym_push and others
that were declared in acc.h and defined in tccgen.c that were lost during
the previous merge of the two branches.
[REFACTOR] Changes necessary for the refactoring of tccelf.c to accelf.c
Merge branch 'refactor' of https://bitbucket.org/NlightNFotis/amethyst into refactor

Conflicts:
	acc.c
Tests run again. There are some errors that need to be resolved with
them though.
[REFACTOR] Renamed tccgen.c to accgen.c
[REFACTOR] Renamed tccasm.c to accasm.c
[REFACTOR] Renamed tccpp.c to accpp.c
[REFACTOR] Renamed tccpe.c to accpe.c
[REFACTOR] Renamed tcccoff.c to acc_coff.c
[REFACTOR] Renamed tcccoff.c to acc_coff.c (added changes to the makefile)
[REFACTOR] Renamed tccrun.c to acc_run.c
[REFACTOR] [TRIVIAL] Renamed many files to more distinguishable names
[TRIVIAL] Made some changes to the README file and to the Contributors list