Adds Copy() function (elliotchance#19)

Implement GetElement method (elliotchance#17)

GetElement returns the element for a key. If the key does not exist, the
pointer will be nil.

Co-authored-by: Jyoti Shete <jyoti.shete@coursehero.com>

Create LICENSE (elliotchance#13)

chore: fix typo (elliotchance#11)

Implement GetOrDefault (elliotchance#8)

GetOrDefault returns the value for a key. If the key does not exist, it returns the default value instead.

Add .editorconfig (elliotchance#9)

Add performance comparison between orderedmap and go built-in map (el…

…liotchance#6)

Added bidirectional iterator (elliotchance#2)

The new methods Front() and Back() can be used to bidirectionally  iterate over the elements. If the map is changing while the iteration is in-flight it may produce unexpected behavior.

Adding Travis CI (elliotchance#1)

Basic functions

Basic functions include Set, Get, Delete, Len and Keys.