unardwire sage-CSI call in csage
python-sage: module_list, use variables from configure

trying to adapt module_list for the build, looks pointless

- BLAS
- conditional extensions
- include paths
- m4ri extra_compile_args
python-sage: __file__ doctest issues

adding explicit __file__ (for VPATH builds) in doctest changes result
slighly

hmm probably this is not a problem.
spkg-install helpers. static version

- hardwire paths
- temporarily ship automake install-sh
move dist files into the right spot

(dist helpers have nothing to do with sage scripts)
toplevel: .gitignore
toplevel: move files (#14796-1)

(extra commit, to help git)
get sage-started.txt from SAGE_ETC
Merge branch 'runtime_paths' into python_sage_build
sagelib: build system (#14807)

this implements a plain ./configure && make interface for the parts
located in /src
Merge branch 'python_sage_build' into sagelib
sage-ext: build-system
Merge branch 'sage_ext' into sagelib
sage-doc: move files
sage-doc: .gitignore
sage-doc: build system
changes to doc sources

- use SAGE_DOC_SRC as doc source path
- make configuration variables configurable
- VPATH quirks (these are is required if srcdir!=builddir. otherwise it
  doesn't make a difference)
Merge branch 'sage_doc' into sagelib
sage-bin: move files (create templates)
sage-bin: build system

(SAGE64 maybe incomplete)