Implement cld
Document cld
Fix hangs and segfaults when egregiously long symbol is used.
Check nb instead of length.
Add tests to catch regressions in code_native and code_llvm.
Add tests for isbits.
Add a bit more explanation.
make `big` map ranges to ranges
improve and clarify LICENSE.md. ref #8248

- update to remove stuff we no longer use, bump version numbers
- clarify what the MIT license applies to
- introduce separate sections for different styles of use. for example
  patchelf is an external program julia doesn't depend on, and some things
  are used only by the standard library.
clarify cholmod and umfpack license info
Merge pull request #8241 from danluu/symbol_hang

Fix hangs and segfaults when egregiously long symbol is used
Merge pull request #8251 from danluu/reflection_test

Add some tests for various reflection functions
Merge pull request #8253 from rfourquet/big-ranges

make `big` map ranges to ranges
Merge pull request #8111 from eschnett/cld

Implement cld
Merge remote-tracking branch 'julia/master' into ndigits_hang
Replace 'manual' cld with cld function now that #8111 has been merged.