gnu: Add perl-extutils-pkgconfig.

* gnu/packages/perl.scm (perl-extutils-pkgconfig): New variable.

gnu: Add perl-extutils-depends.

* gnu/packages/perl.scm (perl-extutils-depends): New variable.

gnu: Add perl-test-number-delta.

* gnu/packages/perl.scm (perl-test-number-delta): New variable.

gnu: Add perl-xml-descent.

* gnu/packages/xml.scm (perl-xml-descent): New variable.

gnu: Add perl-xml-tokeparser.

* gnu/packages/xml.scm (perl-xml-parser): New variable.

gnu: Add perl-mouse.

* gnu/packages/perl.scm (perl-mouse): New variable.

gnu: Add perl-module-build-xsutil.

* gnu/packages/perl.scm (perl-module-build-xsutil): New variable.

gnu: Add perl-cwd-guard.

* gnu/packages/perl.scm (perl-cwd-guard): New variable.

gnu: Add perl-devel-checkcompiler.

* gnu/packages/perl.scm (perl-devel-checkcompiler): New variable.

gnu: Add perl-ev.

* gnu/packages/libevent.scm (perl-ev): New variable.

gnu: Add perl-canary-stability.

* gnu/packages/perl.scm (perl-canary-stability): New variable.

gnu: Add perl-async-interrupt.

* gnu/packages/perl.scm (perl-async-interrupt): New variable.

gnu: leveldb: Update to 1.20.

* gnu/packages/databases.scm (leveldb): Update to 1.20.

gnu: Add jacal.

* gnu/packages/maths.scm (jacal): New variable.
* gnu/packages/patches/jacal-fix-texinfo.patch: New file.

gnu: Add scm.

* gnu/packages/scheme.scm (scm): New variable.

gnu: Add slib.

* gnu/packages/scheme.scm (slib): New variable.

gnu: Merge the two stellaria into one.

* gnu/packages/astronomy.scm (stellaruim): Merge details from stellarium-0.14.
* gnu/packages/education.scm (stellarium): Remove variable.

gnu: bundler: Update to 1.14.5.

* gnu/packages/ruby.scm (bundler): Update to 1.14.5.

gnu: diamond: Update to 0.8.36.

* gnu/packages/bioinformatics.scm (diamond): Update to 0.8.36.

gnu: mutt: Update to 1.8.0.

* gnu/packages/mail.scm (mutt): Update to 1.8.0.