New features and bug fixes

• Add pnorm/qnorm one-argument vectorized versions
• bugfix: Vectorized math operations crashed in the zero-length case.
• Add missing bounds check to array class #100 - Now checks each index component (not just the re-mapped univariate index)
• BesselK atomic + Matern correlation function.
• asSparseMatrix and asSparseVector fix: Conversion from dense to sparse should not drop zero-entries that could potentially become nonzero (i.e. parameter dependent entries).
• CppAD::Variable now works for TMB models
• Script to enable 'runSymbolicAnalysis' on all Linux and OS X systems
• New experimental function 'oneStepPredict' for OSA residuals with ar1xar1 as an example.
• New atomic function 'ppois'
• REPORT: Allow report vector of 'anything'.
• getUserDLL: Improve guess of user's DLL code (when DLL not given to MakeADFun).
• Eliminate warning with '-Wpedantic'
• sdreport new option: ignore.parm.uncertainty
• New example: HMM filter
• General 1D likelihood profile function + method to get profile confidence intervals + plot method
• MakeADFun: New option to move outer parameters to the inner problem (purpose: get same speed as the REML trick for linear fixed effects without loosing the ML interpretation).
• MakeADFun: New argument 'silent' to disable all tracing output.