Merge remote-tracking branch 'refs/remotes/github/develop' into develop
Remove csharp-omnisharp-curl flycheck checker

It didn't compile! A new change in the Flycheck library no longer allows
omnisharp-emacs to build a checker command using the current buffer
contents. This must be worked around separately.

There exists an issue for this at

Latest version of Flycheck incompatible with Omnisharp checker · Issue #66 · sp3ctum/omnisharp-emacs
https://github.com/sp3ctum/omnisharp-emacs/issues/66
Bump version 1.4 -> 1.5
Merge branch 'develop'
Merge remote-tracking branch 'refs/remotes/github/master'
Remove "Start syntax check" from menu bar

The syntax check doesn't work currently
Optional Eldoc support, plus a new function to show the documentation of the symbol at point.
Merge commit 'ec8fd3f650d485275d9210414c9424f1f031329f'