Non-vertical initial point and interpolated points to include 'inc' and 'azi'

[romanshor]

Proposing small changes:

• include the ability to have a non-vertical first point (ie, inclined well from surface)
• added 'inc' and 'azi' to point dictionary for interpolated points in hold and vertical sections
• updated version to 0.7.4

[jcamiloangarita]

thanks @romanshor for your contribution to this project. All changes seems to be fine, but there's still one 1 test failing (tests/test_well.py/test_get_point). Please check it out and add the respective changes to keep all the tests passing.

Just adding the 'inc' and 'azi' properties to the dictionary solves it.

25| self.assertTrue(p == {'md': 100, 'dl': 0.0, 'north': 0, 'east': 0, 'tvd': 100,
26|                       'inc': 0, 'azi': 0,
27|                       'pointType': 'interpolated', 'sectionType': 'vertical'})