Improvements on signal handling interfaces

Made several improvements on signal handling interfaces, making it easier to use.

Fixed sigaction method visibility

Fixes to Signal methods visibility

Fixes to Signal handler

Signal handler needed a public visibility for its delegate.

CPOSIX 0.15.0

Added sigaction support

POSIX: add Regex, update Regex to swift 3, API changes (#168)

• conform POSIXRegex to Zewo/Zewo architecture
• utf8 regex and operators
• move Regex to POSIX module
• add replace tests
• [review] guards and signature changes
• add documentation
• review-2: remove @_exported, use string extension, ...

0.14.0

add codecov badge to posix readme

Add Thread, Lock, Condition

0.13.1

Make tests public (linux parity)

0.13.0

use CPOSIX 0.13

0.12.0

Update to August 4, 2016, sync with quark, add tests (#7)

0.11.0: Merge pull request #6 from Zewo/hd/07-25

Updated Swift to 07-25