SimJoint updates

Changes in SimJoint version 0.3.6 (20200331)

• Upon the request from Brian D. Ripley, time-consuming examples are commented rather than wrapped by \donttest{}.

Changes in SimJoint version 0.3.5 (20200112)

• r-patched-solaris-x86 generated compile error due to the fact that the header file /usr/include/floatingpoint.h used variable name extended, which is re-declared in SimJoint/src/pcg/pcg_random.hpp. Changed extended to pcgExtended in the latter file.

Changes in SimJoint version 0.3.4 (20200108)

• Changed the random number generator from std::mt19937_64 to pcg64 <http://www.pcg-random.org/>.

Changes in SimJoint version 0.2.3 (20200102)

• Fixed a reported bug. Forgot to recover the normalized distributions before postSimOpt() returns.

Changes in SimJoint version 0.2.2 (20190807)

• Updated vignette.