Do not recompile a dependency if nothing changed, closes #759
Add a disclosure about setting Code.eval options
A few 'mix escriptize' fixes:

* Check timestamps of .beam files before generating escript.
* Don't generate an escript if no .beam files exist.
* Add --force option to disregard timestamps.
* List command line options in docs.
* Correctly specify --no-compile as a switch to OptionParser.

Fixes #760.
Use binary matching with the utf8 specifier to implement String.next_codepoint/1.
Merge pull request #762 from alexrp/next-codepoint-match-utf8

Use binary matching with the utf8 specifier to implement String.next_codepoint/1.
Merge pull request #761 from alexrp/master

A few 'mix escriptize' fixes.
Consider config_files in escriptize and improve tests
Do not print messages on up to date escript and update CHANGELOG
Better error messages when a dependency compilation fails
Fix unused variable warning
Mix: Support --no-compile options in deps.get and deps.update. Fixes #763.
Merge pull request #764 from alexrp/master

Mix: Support --no-compile options in deps.get and deps.update.