Add precision to Float.ceil/1 & Float.floor/1
Clarify attributes and exit signals in the language
Merge pull request #2520 from nurugger07/float_modification_merges

Add precision to Float.ceil/1 & Float.floor/1
Optimize and improve docs for Float operations
Update CHANGELOG
Release v0.14.3
Start v0.14.4-dev
Clarify release instructions
Clarify the consequences of using System.at_exit
Remove deprecated features and deprecate soft ones
Merge pull request #2526 from alco/at-exit-doc

Clarify the consequences of using System.at_exit
Update bitstring syntax in base.ex
Merge pull request #2528 from alco/base-warnings

Update bitstring syntax in base.ex
Ensure functions in `Kernel.SpecialForms` and `IEx.Helpers` are also auto-completed

Closes #2527
use pure erlang function to judge the erlang version, no shell.
Merge pull request #2530 from qingliangcn/master

use pure erlang function to judge the erlang version, no shell.
Ensure type_to_signature works for all AST variables