initial Vader support

Author: ivanov

.travis.yml

@@ -0,0 +1,13 @@
+language: vim
+
+before_script: |
+  git clone https://github.com/junegunn/vader.vim.git
+
+script: |
+  vim -Nu <(cat << VIMRC
+  filetype off
+  set rtp+=vader.vim
+  set rtp+=.
+  set rtp+=after
+  filetype plugin indent on
+  VIMRC) -c 'Vader! test/*' > /dev/null

test/simple.vader

@@ -0,0 +1,37 @@
+Given ():
+  Hello
+
+Execute python ( check Python support ):
+  import os
+  import vim
+  from vim import current, vars
+  vim.command('normal! yy2p')
+  current.buffer.append(os.path.basename(vars['vader_file']))
+
+Expect:
+  Hello
+  Hello
+  Hello
+  simple.vader
+
+
+Execute python (check IPython import):
+  import vim
+  from vim import current, vars
+  import IPython
+  current.buffer.append(str(IPython.version_info[0] >= 1))
+
+Expect:
+  Hello
+  True
+
+Execute python (check vim_ipython import):
+  import vim
+  vim.command("set ft=python")
+  vim.command("IPython")
+  import vim_ipython
+  current.buffer.append("vim_ipython loaded")
+
+Expect:
+  Hello
+  vim_ipython loaded