Kyle Baron

# Summary Split off from another PR

See #1005 We can write a function that will force time to be increasing and cache the old time column, which can be recovered. This should consider EVID 4 and...

`readr` and `data.table` will generate data frames with long integers; mrgsolve will crump on this. Possible to coerce to numeric or just drop them the same way we drop character.

Cache output from xml file in a format that is faster to parse. XML file from model run with SAEM and lots of IOV takes a long time to parse.

It's confusing right now.

# Summary - Refactor the check for when t is equal to tout - See #947 for report and resolution

# Summary Consider refactoring mrg::get functions - re-think what we want to make available - re-think mix of overloading and template

# Summary As a user, I want mrgsolve to compile the model under C++11 standard by default.