add access to sigatomic_begin/end from Julia, to defer interrupts for non-interruptable ccalls (see also issue #2622)
Merge pull request #2759 from stevengj/sigatomic

RFC: access to sigatomic_begin/end in Julia for non-interrupt-safe C calls
some cleanup in examples (#2598)
remove bigfib since this is now part of the tests
remove bitvector since we have plenty of BitArray code
move tk example to Tk repo
Add the generalized Schur factorization and make Schur a factorization. Also fix factorizations for Number types, #2729. Remove Dense from factorization names.
Merge pull request #2745 from JuliaLang/anj/gschur

Add the generalized Schur factorization and make Schur a factorization.
Update docs to include Schur factorization and remove Dense.
Update helpdb
help for endianness conversion
fix spacing
Merge pull request #2764 from simonbyrne/master

Help for endianness conversion
fix inverse trig degree functions
Remove image.jl from extras/
Merge pull request #2765 from simonbyrne/master

Fix inverse trig degree-valued functions
fix #2766
fix the inconsistency described in #2763
this was a leftover from an older AST representation