Revert "Deprecate scope_aliases"

This reverts commit 3b4c08d4217be62a6fe60a7eeab329bb7eba8efa.
Fix visual placeholder support

Fixes #129
Updated references to README file.
Edit documentation
Add support for $0 tabstop

A snippet ends with the cursor either at the end of the snippet or at
the $0 tab stop.
Fix variable typo in source code
Merge pull request #133 from bsutic/fix-typo

Fix variable typo in snippet ftplugin
Fix typos in mapping documentation
Use 'sw' if 'sts' is non-positive

At some point, Vim started allowing negative values for 'softtabstop', resulting in hard tabs being removed entirely from expanded snippets. Instead, correctly use 'shiftwidth'.
Add g:snipMate_no_default_aliases option

Fixes #137
Include instructions for installing vim-snippets
Redundant line in syntax file

Merges pull request #139.
Update contributors list
Fix a typo in README

The link to the vim-snippets repo was missing a /

Merges pull request #140.
Add plug mapping <Plug>snipMateTrigger

With this mapping a user can trigger a snippet expansion while already
inside an expanded snippet.
Add snipMate#CanBeTriggered() function

Users can check if the word before the cursor is a valid trigger.

Merges pull request #141
Release version 0.87