Merge pull request ctrlpvim#561 from obcat/restore-line-prefix

Restore line prefix

Merge pull request ctrlpvim#329 from ctrlpvim/release1.80

release 1.80

Version 1.79

Version 1.78

Ver bump

Ver bump

Fix last entered sorting

Use :undolist for older Vim versions

Improve :

* Improve s:sanstail() and ':' input
* Shorten s:samerootsyml(), s:ispathitem()
* Add g:ctrlp_log, an option to write all output to .ctrlp_cache/ctrlp.log
* Fix an error with ctrlp#utils#glob()

Custom ignore and default command options

* Extend jump-to-open-buffer to use <c-t> when jump_to_buffer = 2.
  Only works for buffers opened in another tab.  Suggested by @hail2u.
* Add g:ctrlp_default_cmd, option to reuse the default mapping for a
  different command.  Close ctrlpvim#57.
* Add g:ctrlp_custom_ignore.  Close ctrlpvim#58.