Add CITATION file that references the arXiv paper for ensmallen (close #3) (#4)

* Add `CITATION` file that references the arXiv paper for `ensmallen` (close #3)

* Add ChangeLog entry...

Author: coatless

ChangeLog

@@ -1,3 +1,11 @@
+2018-10-23  James Balamuta  <[email protected]>
+
+	* inst/CITATION: Add citation information for ensmallen's arXiv paper.
+
+2018-10-22  Dirk Eddelbuettel  <[email protected]>
+
+	* README.md: Minor touchups.
+
 2018-10-21  James Balamuta  <[email protected]>
 
 	* DESCRIPTION (Version, Date): Initial release

DESCRIPTION

@@ -2,7 +2,7 @@ Package: RcppEnsmallen
 Title: Header-Only C++ Mathematical Optimization Library for 'Armadillo'
 Version: 0.1.10.0.1
 Authors@R: c(
-    person("James", "Balamuta", email = "[email protected]", 
+    person("James Joseph", "Balamuta", email = "[email protected]", 
            role = c("aut", "cre", "cph"), 
            comment = c(ORCID = "0000-0003-2826-8458")),
     person("Dirk", "Eddelbuettel", email = "[email protected]", 

inst/CITATION

@@ -0,0 +1,32 @@
+citHeader("To cite 'RcppEnsmallen' in publications use:")
+
+citEntry(entry = "Manual",
+         title        = "{RcppEnsmallen: Header-Only C++ Mathematical Optimization Library for 'Armadillo'}",
+         author       = personList(as.person("James Joseph Balamuta"),
+                                   as.person("Dirk Eddelbuettel")
+                                  ),
+         year         = 2018,
+         textVersion  = paste("James Joseph Balamuta and Dirk Eddelbuettel (2018)",
+                              "RcppEnsmallen: Header-Only C++ Mathematical Optimization Library for 'Armadillo'.",
+                              "URL https://cran.r-project.org/package=RcppEnsmallen.")
+)
+
+citEntry(entry = "Article",
+         title        = "{ensmallen: a flexible C++ library for efficient function optimization}",
+         author       = personList(as.person("Shikhar Bhardwaj"),
+                                   as.person("Ryan R. Curtin"),
+                                   as.person("Marcus Edel"),
+                                   as.person("Yannis Mentekidis"),
+                                   as.person("Conrad Sanderson")),
+           journal = "{ArXiv e-prints}",
+           archivePrefix = "arXiv",
+           eprint = "{1810.09361}",
+           primaryClass = "cs.MS",
+           keywords = "{Computer Science - Mathematical Software, Computer Science - Machine Learning, Mathematics - Optimization and Control, 65K10, 68N99, 68W99, 90C53, G.1.6, G.4}",
+           year = "2018",
+           month = "oct",
+         textVersion  = paste("Shikhar Bhardwaj, Ryan R. Curtin, Marcus Edel, Yannis Mentekidis, and Conrad Sanderson (2018).",
+                              "ensmallen: a flexible C++ library for efficient function optimization.",
+                              "ArXiv e-prints, 1810.09361, cs.MS.",
+                              "URL https://arxiv.org/abs/1810.09361.")
+)