add rc/fish.kak
Merge pull request #178 from alexherbo2/fish-rc

add rc/fish.kak
clean_around_selections: select full lines before filtering
rename clean_around_selections command to filter_around_selections
indent_on_new_line: handle 'else if' command
indent_on_new_line: indent after (case|else) commands
indent_on_char: deindent on (else|end) command insertion
Merge pull request #179 from alexherbo2/fish-rc

fish.kak: code maintenance
client.kak: allow granular terminal ordering in termcmd option