Changes in Ver 0.2.0-2
   * the same as those in Ver 0.2.0-1 with some corrections in Rd files.

Changes in Ver 0.2.0-1 (not submitted to CRAN)
   * Replace "is.real()" with "is.double".
   * Some functions are made invisible, that is, not exported.

Changes in Ver 0.2.0
   * Add two functions, "hh.test" and "nt.test" for doing diagnostic tests

Changes in Ver 0.1.9
   * Corrected bugs in "dlc.R"

Changes in Ver 0.1.8 (not published)
   * Corrected bugs in "dlc.R"

Changes in Ver 0.1.7
   * Corrected a bug in calculating standard errors of the estimates in "dcc_results.R". 
   * Considerable changes in descriptions of the help files.

Changes in Version 0.1.6
   * Modified the C-level source code (R_eccc_sim.c) for simulating a CCC-GARCH model.