Pull request #17: HTTK-35

Merge in HTTK/httk-dev from HTTK-34 to patch/2.2.3 - changes relate to HTTK-35

* commit '7b5567159bb7bb3b5d6721b2b32a416053847e43':
  Updated grammar in model_solve.R times description on lines 56 and 57
  Updated description for 'times' argument on lines 56 and 57

httk/R/solve_model.R

@@ -53,8 +53,8 @@
 #' be specified.
 #' @param dtxsid EPA's DSSTox Structure ID (\url{http://comptox.epa.gov/dashboard})  
 #' the chemical must be identified by either CAS, name, or DTXSIDs
-#' @param times Optional time sequence for specified number of days. Dosing
-#' sequence begins at the beginning of times.
+#' @param times Optional time sequence for specified number of output times (in days) to be returned by the function.
+#' The model is solved explicitly at the time sequence specified. Dosing sequence begins at the first time provided.
 #' @param parameters List of chemical parameters, as output by 
 #' parameterize_pbtk function. Overrides chem.name and chem.cas.
 #' @param model Specified model to use in simulation: "pbtk", "3compartment",