Update READMEs

cpp/datastructs/templates/README.md

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+# Datastructs
+
+A collection of templated datastructures written in C++
+
+```
+klips/cpp/datastructs/templates/
+.
+├── binarysearchtree    # Templated binary search tree
+├── doublelist          # Templated doubly linked list
+├── queuelist           # Templated queue implementation using linked list
+├── README.md
+├── stacklist           # Templated stack implementation using linked list
+└── vector              # Templated custom vector implementation 
+```