Import transpile with import * (#2285)

* import transpiler

* fix ordering

* fid to new location

* Update __init__.py

qiskit/__init__.py

@@ -30,6 +30,7 @@
 from qiskit.circuit import QuantumRegister
 from qiskit.circuit import QuantumCircuit
 from qiskit.execute import execute
+from qiskit.compiler import transpile, assemble
 
 # The qiskit.extensions.x imports needs to be placed here due to the
 # mechanism for adding gates dynamically.