Removed unused functions (such as sage-shell:output-filter-rdct-lop).
Removed sage-shell:if-proc-and-anything-exists.
Fixed sage-shell-cpl:candidates.
Merge branch 'master' into alpha
Silence byte compile warning in Emacs 23.
Changed flycheck setting.
Modified sage-shell:sagetex-load-file.
cache the result of sage-shell:completion-at-point-func.
Added sage-shell:completion-ignore-case.
Added sage-shell:completion-candidate-regexp.
Change the default value of sage-shell:completion-candidate-regexp.
Fixed sage-shell:clear-completion-sync-cached.
Update version.