1) Install Quick Uv Projection in the User Preference Editor:

change your shortcuts here:

2) Press B  key to call Quick UV projection Pie Menu and play with it!

3) Rotate Uvs incremental:

• Click on Rotate Uvs it rotates the uvs with 90° angle by default
• Click+CTRL on Rotate Uvs it rotates the uvs with 45° angle 
• Click+SHIFT on Rotate Uvs it rotates the uvs with 30° angle

4) Modal Uv:

Be Sure to be in Face-Mode to transform faces uv!

Click then choose between all thoese shortcuts:

• 'S' : Scale: 
• 'R' : Rotate
• 'G' : Move: 
• 'A' : Select All
• 'Ctrl-Z' : Cancel
• 'TAB' : Edit Mesh
• 'K' : Knife  !!!  validate your cut with Spacebar to stay in Modal !!! 
• 'Numpad 0' : Fit Texture to Face
• 'X','Y'  : Mirror the texture in X,Y
• 'BUTTON4MOUSE' , 'RETURN' or 'NUMPAD_ENTER' : Validate your operation

5) Unwrap:

6) Link Material

1. Select youre Mesh
2. Select the object you want to pick material from
3. Press B and Click on Link Material

7) UV Gizmo CUBE

• When youre mesh is selected Click on Uv Gizmo, it will create  Gizmo that allows you to Scale, Rotate, Move and Stretch interactivelly the Uvs in the 3D viewport.

• How it works?

    it Creates a UVWarp Modifier. Once you are Ok with your Uv Projetction you  can apply the modifier by Click "Apply"

• To use Gizmo only on a part of the mesh:

1. Select some faces
2. Click on UV Gizmo and Apply
3. Set youre scale, rotation 
4. Select detached faces
5. Select the original mesh
6. Click"Apply"

9) Real Size Gizmo:

• Set your Size, Rotation or Scale interactively
• You can enter precize values in the Redo Panel or in the Tranform Panel
• Defaut value is 1 meter
• Same metohd than the Cube gizmo in Object mode or edit mode:

1. Select detached faces
2. Select the original mesh
3. Click"Apply"

9) Project texture from view:

• you can project texture from view by pressing B and drag on the Right.
  
• Rotate the viewport 45°:  Ctrl+Alt+ MiddleMouseButton
• Rotate the viewport -45°:  Ctrl+Shift+Alt+ MiddleMouseButton

9) Cylinder Projection

Be sure to be in Orthoganal view before launching the Cylinder Projection

Please take a look at the Demo that will show you accuratelly how Quick Uv Pro Works.

Enjoy!