PackageInfo.g: Unify various URL strings

Also, automatically use the current package version in the ArchiveURL
Update .gitignore
makedoc.g: call CopyHTMLStyleFiles()

This ensures *.css and *.js files stay up-to-date. In particular,
we can now remove the ancient and obsolete doc/manual.css in
the repository.
Cleanup PackageInfo.g
Fix LongTitle to not repeat package name
PackageInfo.g: don't set 'Autoload' (which only GAP <= 4.4 uses)
Add .mailmap
Merge pull request #3 from james-d-mitchell/master

Update of the hash functions for partial perms and transformations
Merge pull request #5 from james-d-mitchell/master

Resolved Issue #4 and a further bug caused by orbits with seeds
PackageInfo.g: update WWW and download URLs
build: add autogen.sh
build: remove generated files
Update .gitignore
build: remove targets 'archive', 'towww'
build: avoid installing stuff into PWD
build: fix AM_SILENT_RULES, some other tweaks

In particular, require automake >= 1.11; enable automake
warnings; and fix one of those warnings (we need to use
AM_PROG_AR, and that has to be called before LT_INIT)
makedoc.g: regenerate VERSION file
build: cleanup
build: make AC_INIT use VERSION file & github links
remove CVS leftovers