add news item for git-annex 0.20110420

doc/news/version_0.20110325.mdwn

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-git-annex 0.20110325 released with [[!toggle text="these changes"]]
-[[!toggleable text="""
-   * Free space checking is now done, for transfers of data for keys
-     that have free space metadata. (Notably, not for SHA* keys generated
-     with git-annex 0.2x or earlier.) The code is believed to work on
-     Linux, FreeBSD, and OSX; check compile-time messages to see if it
-     is not enabled for your OS.
-   * Add annex.diskreserve config setting, to control how much free space
-     to reserve for other purposes and avoid using (defaults to 1 mb).
-   * Add --fast flag, that can enable less expensive, but also less thorough
-     versions of some commands.
-   * fsck: In fast mode, avoid checking checksums.
-   * unused: In fast mode, just show all existing temp files as unused,
-     and avoid expensive scan for other unused content.
-   * migrate: Support migrating v1 SHA keys to v2 SHA keys with
-     size information that can be used for free space checking.
-   * Fix space leak in fsck and drop commands.
-   * migrate: Bugfix for case when migrating a file results in a key that
-     is already present in .git/annex/objects.
-   * dropunused: Significantly sped up; only read unused log file once."""]]

doc/news/version_0.20110420.mdwn

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+git-annex 0.20110420 released with [[!toggle text="these changes"]]
+[[!toggleable text="""
+   * Update Debian build dependencies for ghc 7.
+   * Debian package is now built with S3 support.
+     Thanks Joachim Breitner for making this possible.
+   * Somewhat improved memory usage of S3, still work to do.
+     Thanks Greg Heartsfield for ongoing work to improve the hS3 library
+     for git-annex."""]]