Config to definitions

See merge request !41

Host Refactors and Client Changes

See merge request !38

- send one empty request to host to get current time (have to do this since we power cycle the CAM every time we use it)
- name picture according to the current date and time

sim800l is only capable of registering to the network right now.
It will be improved if the network connectivity on the mountain requires it

# Conflicts:
#	host/host_central_mast/src/main.cpp

refactors of host

See merge request !37

defined pin numbers for managing data transmissions of I2C, SDI12, RS485.
initial setup for the client_central_mast client

- move several blocks of code to their own respective functions
- move some functions to Utilities and ApiData
- Remove several unused functions