sparse matrix access in llvm generated code

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/feature-llvm@1268 c0027639-9190-0b57-01eb-f09a03790dae
updates

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/feature-llvm@1269 c0027639-9190-0b57-01eb-f09a03790dae
stoichiometry updates

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/feature-llvm@1270 c0027639-9190-0b57-01eb-f09a03790dae
stoichiometry setting basically working

git-svn-id: https://roadrunnerlib.googlecode.com/svn/branches/feature-llvm@1271 c0027639-9190-0b57-01eb-f09a03790dae
Merge branch 'gfeature-llvm' into gdevelop