Update TwitterMediaEntity.java

Add support for long and short Instagram urls
Should use https instead of http
Merge pull request #1 from RawkBob/patch-2

Should use https instead of http
Fix more hardcoded url lengths
Merge pull request #2 from RawkBob/patch-2

Fix more hardcoded url lengths
Merge pull request #62 from RawkBob/patch-1

Add support for short and long instagram urls