docs: Adjust table spacing in topindex page.
docs: Add skin imgs; change external links to micropython.org/resources.
docs: Add pdf size info to datasheet links.
docs: Add debounce tutorial; order Pin methods; add pull resistor info.
docs: Add links from quickref to pyb classes.
docs: Update front page to display date of last update.
docs: Bump version to 1.3.6.

This needs to be done before actually tagging the new version.
unix: fast: Set initial module dict size big to have high pystone score.

For this, introduce MICROPY_MODULE_DICT_SIZE config setting.
py: Allow +, in, and compare ops between bytes and bytearray/array.

Eg b"123" + bytearray(2) now works.  This patch actually decreases code
size while adding functionality: 32-bit unix down by 128 bytes, stmhal
down by 84 bytes.
py: Allow bytes object as argument to some str methods.

This turns failing assertions to type exceptions for things like
b"123".find(...).  We still don't support operations like this on bytes
objects (unlike CPython), but at least it no longer crashes.
py: Deactivate more code without MICROPY_PY_SYS

When compiler optimization has been turned on, gcc knows that this code
block is not going to be executed. But with -O0 it complains about
path_items being used uninitialized.

Signed-off-by: Sven Wegener <sven.wegener@stealer.net>
bare-arm: Add dummy __assert_func and __fatal_error

Required to build bare-arm with debugging.

Signed-off-by: Sven Wegener <sven.wegener@stealer.net>
stmhal: Declare variables extern in include files

Else we end up with several instances of the variable.

Signed-off-by: Sven Wegener <sven.wegener@stealer.net>
py: Add order-only dependency for py-version.h

Else the directory might not exist.

Signed-off-by: Sven Wegener <sven.wegener@stealer.net>