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Conflicts:
	py/emitglue.c

Should finish addressing issue #524.

Ports which wants to have it, should define MICROPY_PY_SYS_PLATFORM to a
string value they need.

Benefits: won't crash baremetal targets, will provide Python source location
when not implemented feature used (it will no longer provide C source
location, but just grep for error message).

This reduces stack usage by 16 words (64 bytes) for stmhal/ port.

See issue #640.

?= operator does not do delayed expansion (unlike =).

toolchain fixes to enable cross compatibility

Build patches for FreeBSD (as discussed in the former pull request #666)

  cast error in MP_OBJ_NEW_SMALL_INT(). This is necessary for FreeBSD, where
  st_ino is of different size
- If MP_CLOCKS_PER_SEC is defined on the target host, simply define CLOCK_DIV
  as a fraction, regardless of the value of MP_CLOCKS_PER_SEC.
  FreeBSD uses a non-POSIX compliant value of 128 for CLOCKS_PER_SEC

- Move the includes for alloca() intp mpconfigport.h

  there are special tweaks and paths to be considered. Just provide some
  defaults, in case the values are undefined.
- py-version.sh does not need any bash specific features.
- Use libdl only on Linux for now. FreeBSD provides dl*() calls from libc.

unix: Fix path seperator used depending on OS

Bring the C and Python compute_hash functions into consistency

A couple of small fixes to run-tests

Fix str.modulo when precision is specified.

This behaviour follows Python 3.5 standard (in 3.4 it's a
DeprecationWarning which we'd rather make a TypeError).

Change comments (mainly URLs) to no longer specifically say Python 3.3

Some small fixed:

- Combine 'x' and 'X' cases in str format code.

- Remove trailing spaces from some lines.

- Make exception messages consistently begin with lower case (then
needed to change those in objarray and objtuple so the same
constant string data could be used).

- Fix bug with exception message having %c instead of %%c.

Remove tests that fail under CPython 3.5

Also, make sure that args to "*" format specifiers are bounds-checked
properly and don't lead for segfaults in case of mismatch.

See http://bugs.python.org/issue19995 for rationale. As micropython currently
aims for Python 3.3 compatibility I have not changed behaviour, but this
change allows the test suite to be run against a newer Python without having
spurious failures.