Updated NEWS for version 4.4.3 (list of bug fixes).
Push scripts for reindenting and for fixing copyright years.
Make scripts work when run from other directories.
Ref. manual: fix paths for Debian/Ubuntu packages.
packaging: update os x packaging script
Merge remote-tracking branch 'upstream/master'
New location for binary build dependencies under Windows

(and FlexLexer.h for OS X)
extended_path: fixed bugs when model doesn't converge
Fix STEADY_STATE operator for model local variables.

Thanks to Tom Holden for spotting the bug.
extended-path: fixing bug when options_.initial_period is NaN
Fix substring operator in macro-processor.

The characters of the substring could be mixed with random characters from the
memory space. Thanks to Tom Holden for reporting the bug.

Closes #708
Merge remote-tracking branch 'upstream/master'