#302 cscope_maps.vim issues when reopening a file in a project

[blarsen]

When opening a file in a project that has already been opened, the line 42 on cscope_maps.vim can fail, since the file cscope.out has already been imported once. this can be fixed by adding "set nocscopeverbose" to a previous line

nocscopeverbose seems to be the default behaviour for neovim, but not for regular vim. However, cscope_maps.vim also doesn't fully work on neovim, since it handles C-Space correctly, but this is a separate issue.