removed 'SymbolList', a C code generation specific construct from the ExecutableModel interface

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/develop@1168 c0027639-9190-0b57-01eb-f09a03790dae
ran Linux tests

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/develop@1169 c0027639-9190-0b57-01eb-f09a03790dae
ran 32 bit Linux tests
Merge dione.chem.indiana.edu:~/src/roadrunner into gdevelop

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/develop@1170 c0027639-9190-0b57-01eb-f09a03790dae