Use sync call when imenu is called interactively
Fix: unintended was inserted by jedi:dot-complete

fixes #59
Revert "Check the point to avoid inserting extraneous text"

This reverts commit 19f74fd834ab9e10c8ae47319923830cb032798c.
Merge branch 'issue-59'

* (ac-start) is used instead of (auto-complete ...)
* fixes #59 -- jedi:complete-on-dot may insert extraneous text