Documentation changes

[T-Nicholls]

Amended index.rst for improved clarity, especially for beginners.
Changes:

• reworded design paragraph to make the hierarchy clearer.
• moved element families sentence to below design paragraph where it fits better.
• added an explanation of handles after the element families sentence to make misc features paragraph.

To do:

• add a sentence explaining the pv's names/values/IOC's/EPICS at the end of the first paragraph.
• add an explanation about machines before the current machines sentence.
• append an explanation of modes for load_csv() to the end of machines paragraph.
• clarify the section on data and data conversion, there isn't anything similar the explanation you gave me about the current in the magnet vs the strength of the magnetic field being the distinction between ENG and PHYS, instead only a section on data conversion; in short lots about data conversion but nothing about data, an example would not go amiss.

[coveralls]

Coverage remained the same at 94.321% when pulling 802a2ee on T-Nicholls:docChanges into 362ccce on willrogers:master.

[T-Nicholls]

Changed examples.rst to make it more intuitive.
Changes:

• Split initialisation section in into Installation and Initialisation and moved existing content accordingly.
• Added new content to both Initialisation and Installation sections.
• Updated the titles of BPM and QUAD example sections to better reflect their content.
• Changed the wording of a few bullet points to improve clarity.

To do:

• Add an explanation about 'VMX' ring mode.

[willrogers]

These changes look good, except for a new semicolon. Are these really independent clauses?

https://writing.wisc.edu/Handbook/Semicolons.html

[T-Nicholls]

Yep; it was incorrect, I have fixed it now.

[T-Nicholls]

Changed pytac.rst; added pytac.utils automodule.

[willrogers]

I merged this to generate a new version on readthedocs.

You can continue pushing to the same branch and create a new pull request with further changes.