Initialization of repository
Trac #12112: Support --disable-compiler-checks option
added openssl and dpkg-architecture check
make dpgk-architecture check error out, its at least in Ubuntu 8.04
Trac #13329: small reviewer fixes
Trac #13329: Add -lcrypto and -ldl (needed for -lssl), support SAGE_LOCAL
trac 13385: Remove check for openssl.
Trac #14406: remove sqrtl() and SAGE_FORTRAN/SAGE_FORTRAN_LIB checks
Merge in prereq-1.2
Integrate prereq in the build system
Don't use cp -p in sage-clone-source
Merge branch 'u/jdemeyer/ticket/15596' of git://trac.sagemath.org/sage into ticket/15580

Conflicts:
	src/bin/sage-sdist
Allow sage --sdist without building Sage
Create and use "configure" tarball for auto-generated files
Use build/pkgs/configure/package-version.txt for configure version number
Create sage-autogen script to generate configure tarball
rename to bootstrap, run during version bump
add a SPKG.txt file
also commit changes to confball in sage-update-version
fix typos in SPKG.txt