Minor speedups and bugfixes

• sdreport optimizations. Avoid repeating the forward sweep
• asVector: optimization
  • Take advantage of Eigen's compile time optimizations.
  • 'asVector' does not show up in profiler after this change.
• Add option to skip the zero order forwardsweep
• sdreport: New argument getReportCovariance #146
  • Reduces memory usage when many variables are ADREPORTed
• Small optimization
  • 'match.arg' can cause substantial overhead
• New preprocessor flag 'TMB_LIB_INIT'
  • Register some native symbols of the user template.
• Register native routines
• Update matrix and array examples
• Rename parameter alpha to omega (to avoid confusion with Lindgren) and add derived quantity rho
• bugfix: numeric(0) in random list of MakeADFun #111
  • Description: When a parameter vector is numeric(0) and its name is
    included in the random list, then MakeADFun gives wrong obj$par
    list.
  • Same would be the case for 'profile' argument to MakeADFun.
• folder 'tmb_syntax' minor cleanups
• Fix 'dontrun' part of example(sdreport)
• Be tolerant to systems witout OpenMP support
• New atomic: convol2d
• atomic::matmul: speedup
• CppAD::thread_alloc: Speedup
  • Profiler discovered much time spent in allocator when using atomic functions with high dimensional input/output.
  • Fix: Avoid calling constructor if Type=double. Does not affect the unittests