Fix compilation on GHC 7.0 by not using Trustworthy

use clock_gettime to implement getPOSIXTime if available

Ensure Read/Show instances are always provided with UTCTime and Universa...

Convert README file to markdown.

Loosen required cabal-version

1.14 has the same features as 1.10 so this was overly restrictive and can prevent you from installing time on older GHCs.

Document that the show instance for UTCTime is elsewhere.

Also change 'darcs' to 'git'.

De-tabify all Haskell source files.

This library is a GHC core library and GHC is now built using the
-fwarn-tabs flag by default. De-tabifying this brings it into line
with GHC standard practice.

Also add -fwarn-tabs to the cabal file.

Closes: https://github.com/haskell/time/issues/18

Fix note about `%Y` padding.

Improve documentation of wdays in TimeLocale

Fix deprecation of Foreign.Safe in base 4.8