RES-1263 remove scheduled upgrade from reseller api
Merge pull request #515 from danielamihalache/ResellerRemoveScheduledUpgradeFromResellerApiDocs-RES-1263

[CR] RES-1263 Remove scheduled upgrade from reseller api
Missing &
Create scheduling_parameters

I think I did this right, you may want to check that my json examples and the navigation is correct. This is to support our recently release of scheduled sends with the delayed sending parameters. You can check the internal docs here for questions: https://wiki.sendgrid.net/display/TC/Overview%3A+Delayed+Sending
move template engine docs
initial draft of v3 ip management docs
add warmup schedule and more docs
fix table formatting
add more context to warmup schedule, change to .md
add directories and placeholders
moved template engine into API v3

moved the template engine documentation into the new API v3 section.

as such a new page had to be created to better describe the template API,
as the current one was repurposed to describe API v3.
template nomenclature fix
basic asm

added groups endpoints
renamed manager -> management
management -> manager
initial placeholder docs for suppressions
add search resource
fix typo
add suppressions.md
add global suppressions docs
fix title