Reset 'shell' to improve compatibility
Small doc improvement for pause, closes #199
Return pattern for prototype if linenr is not available, closes #219
Handle unloaded buffers when getting prototype, closes #222
Small preview window improvements, ref #161
add tagbar to support Rust language
comment out the checking for Ctags
let s:known_types.rust = type_rust
 add rust tagbar support with character-based rust.c
method : f ==> F
move 'method' to 'interface'
 tagbar document to support Rust
 keep line to short <= 80 columns