Style: Removed spaces, tabs at the end of line.
[TetGenInterface] Var "id" is not used.
[TetGenInterface] Narrowed scope of pos_beg and pos_end.
[TetGenInterface] parseElements(): const method.
[TetGenInterface] alloca is not part of standard.

alloca is not part of the standard, the behaviour is compiler dependend,
some sites in the net say that implementations can contain bugs.
[TetGenInterface] Removed unused code.
[TetGenInterface] Made two methods const.
Merge pull request #9 from TomFischer/TetGenReaderExtension

Some commits concerning style and a warning.