Added CHANGELOG, improved other docs

CHANGELOG.md

@@ -0,0 +1,3 @@
+# Changelog
+
+(no stable releases have been published yet)

R/ownNum2Str.R

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 #' @title Own number to string
+#' @description Converts numbers to strings
 #' @param number number
 #' @note On Matlab, if number is NaN the output is 'NaN'. Here, the output will be an error. Also, the function belo expects "number" to have length one, whereas Matlab accepts vectors.
 #' @export

TODO.md

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-# Minimum requirements for next stable release
+# Roadmap for next stable release
+
+## Minimum requirements
 
 For the first stable release of rBAPS, the following features should be implemented:
 
@@ -10,6 +12,13 @@ For the first stable release of rBAPS, the following features should be implemen
 
 Note to contributors: as tasks get finished, please update this file with an `x` and keep it there. This should help us fill out a changelog for an eventual stable release.
 
+## Wishlist
+
+The list below contains non-essential but nice-to-have tasks for the next stable release.
+
+- [ ] Uniformize capitalization of function names
+- [ ] Uniformize capitalization of function arguments
+
 # Known pitfalls
 
 The following behavioral differences have been detected between the Matlab functions and their R counterparts. In order to save time, these differences will not be addressed, since they could require extensive reworking of a function. However, such differences may very well cause unexpected problems in some situations, which is why compiling this list is so important. The list below might provide a good starting point for identifying and fixing bugs: