Overview of changes in gcalctool 5.8.16

* Released a gcalctool tarball for GNOME 2.15.3.

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Overview of changes in gcalctool 5.8.15

* Fixed bug #343150. Gcalctool no longer crashes when switching to 
  scientific mode.

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Overview of changes in gcalctool 5.8.14

* Adjusted configure.in so that gcalctool now requires intltool v0.35.0.

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