Add mergeDuplicateCollocates function

Change-Id: Ib9d458dc233167c20c9fdedf2f30656d693c32ff
diff --git a/NAMESPACE b/NAMESPACE
index 47165ab..42fe68e 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -19,6 +19,7 @@
 export(ipm)
 export(ll)
 export(logDice)
+export(mergeDuplicateCollocates)
 export(mi2)
 export(mi3)
 export(mutate)
@@ -60,6 +61,7 @@
 importFrom(broom,tidy)
 importFrom(curl,has_internet)
 importFrom(dplyr,.data)
+importFrom(dplyr,across)
 importFrom(dplyr,anti_join)
 importFrom(dplyr,arrange)
 importFrom(dplyr,as_tibble)
@@ -68,7 +70,9 @@
 importFrom(dplyr,case_when)
 importFrom(dplyr,desc)
 importFrom(dplyr,enquo)
+importFrom(dplyr,everything)
 importFrom(dplyr,filter)
+importFrom(dplyr,first)
 importFrom(dplyr,group_by)
 importFrom(dplyr,if_else)
 importFrom(dplyr,mutate)
@@ -81,6 +85,7 @@
 importFrom(dplyr,starts_with)
 importFrom(dplyr,summarise)
 importFrom(dplyr,tibble)
+importFrom(dplyr,ungroup)
 importFrom(ggplot2,GeomPoint)
 importFrom(ggplot2,aes)
 importFrom(ggplot2,element_text)
@@ -92,6 +97,7 @@
 importFrom(ggplot2,layer)
 importFrom(ggplot2,scale_x_continuous)
 importFrom(ggplot2,theme)
+importFrom(httr,build_url)
 importFrom(httr,parse_url)
 importFrom(jsonlite,fromJSON)
 importFrom(lubridate,year)