chore(readme): Cleanup and re-organization
chore(readme): Cleanup and re-organization

- Update tagline to be congruent with the one in *What is Kong?*
- Give ToC a heading and proper list type / style.
- More concise and straightforward installation.
- Reword documentation line.
- Usage restructuring, make notice about $PATH a note.
- Concise development instructions.
- Rename Makefile to Makefile Operations
smanolache/kong,Kong/kong,vzaramel/kong,ajayk/kong,kyroskoh/kong,rafael/kong,kyroskoh/kong,salazar/kong,ind9/kong,akh00/kong,ccyphers/kong,beauli/kong,vzaramel/kong,jebenexer/kong,Kong/kong,rafael/kong,shiprabehera/kong,ejoncas/kong,icyxp/kong,streamdataio/kong,isdom/kong,li-wl/kong,ejoncas/kong,Kong/kong,Mashape/kong,isdom/kong,ind9/kong,jerizm/kong,streamdataio/kong,xvaara/kong,Vermeille/kong