Needs ability to skip initialization of timers 1 & 2

Some complex project uses that timers "manually" but init() in wiring.c always initializes them to PWM. Why not to surround code (lines 284-327 in wiring.c) with #if ! defined(SKIP_TIMER1_INIT) / #endif so one can define such "magical" constants and escape from unneeded code. Now I forced to patch some of that files to adopt to my projects

Start in wiring.c at lines 284-327, where init() initializes timers 1 and 2 for PWM. Trace how those timer setup sections are selected and how compile-time options are defined in the core. Done means projects can skip the relevant initialization with a definition while the default initialization remains unchanged; no test file is mentioned.

Written by the indexing model from the issue text.