Bug fix: Don't complain about 'updatetime' when autoload is disabled (issue #47)

Issue #47 on GitHub:
  https://github.com/xolox/vim-easytags/issues/47
Add g:easytags_updatetime_warn option, improve documentation (issue #47)

Issue #47 on GitHub:
  https://github.com/xolox/vim-easytags/issues/47
Document BufWritePost example, improve documentation structure (issue #46)

Issue #46 on GitHub:
  https://github.com/xolox/vim-easytags/issues/46
Improve reporting of multi-line messages (now split over lines)
Bug fix for xolox#misc#option#eval_tags() option
Apply hard wrapping to README.md
Bug fix: Make xolox#misc#os#exec() compatible with (t)csh (reported by Armin Widegreen)

Original report:
  https://github.com/xolox/vim-easytags/pull/48
Improve error reporting in xolox#misc#os#exec()
Bug fix: Correct wrong expansion order in xolox#misc#path#which()
Added inline documentation everywhere, also included in README.md*

* Using a new tool I'm working on: A Python script that scans a Vim
  script project for global function definitions and their documentation
  comments (in Markdown format) and generates a single Markdown document
  that provides an overview of the functions defined in the scripts.
Improve the error message thrown by xolox#misc#compat#check()
Updated miscellaneous scripts
Document the g:easytags_events option (issue #46)

Issue #46 on GitHub:
  https://github.com/xolox/vim-easytags/issues/46
Add xolox#misc#timer#force() function
Remove line continuation from xolox#misc#os script
Add xolox#misc#os#find_vim() function
Update documentation in README
Updated miscellaneous scripts