add pane switch commands
document missing command
add pane creation commands
add pane creation docs
add pane specs
rename spec descriptions to use keybinding names
add H, L, and M
add H, L, and M to docs
remove log statement
support counts
explicit super call
use screen coordinates
add specs for H-L-M
Merge pull request #104 from dougblack/panes

add pane switch commands
Add changelog for #104
Merge pull request #77 from dougblack/H-L-M

add H, L, and M
Add changelog for #77
Prepare for 0.8.0
Prepare 0.8.0 release
Add splits to README