Add Shougo/neosnippet-snippets. Fixes #539. Shougo/neosnippet version 4.1 split the repository into two and the other half is now missing, see the PR for details.
Fix neosnippet and neosnippet-snippets order to follow the instructions at Shougo/neosnippet
add $app_dir var to point to application root

This is about the same as the %BASE_DIR% var in the windows
scripts
rename BASE_DIR to APP_DIR
Merge pull request #551 from ljani/3.0

Add Shougo/neosnippet-snippets. Fixes #539.
Merge pull request #555 from jrobeson/add-app_dir-var

add app_dir var to point to root of application
Test for `+X11` before using clipboard=unnamedplus
Fix test for 'unnamedplus' again...
Merge branch 'pr/565' into 3.0

Fixes #564, #565
Merge remote-tracking branch 'upstream/3.0' into 3.0