Remove seperator before git branch name
Reinstate zprezto initialization and use completion module

Add zpreztorc

Add edited zprezto module completion init.py file
Moved some zstyle for completion to zprezto module. The one that's left in .zshrc doesn't seem to work if moved to the completion module.

Disable zprezto prompt module
Don't update prompt every 1s - update every 60s

Having the prompt update every 1s significantly interrupts command completion (builtin zsh compinit or zprezto completion module) to annoying extent!
Trade-off:
The prompt is updated every 60s, mainly just to update the git section of the prompt rather than the time.
When a command is executed the time on the command line is then updated to the current time. This has been added to the preexec preexec_start_cmd_timer hook but could be split off later.

Added an option to print the time of command execution starting on the line following the prompt (commented out).