Replace fgrep with `grep F` in makefile

```
fgrep: warning: fgrep is obsolescent; using grep -F
```

Workaround partially missing prometheus metrics

Workaround partially missing metrics.
e.g. if we have a list of 4 partitions with metrics missing for
2 out of 4, like [10,11,0,0], resulting "expectedConsumption will be sum
 of [10,11,11,11]

Expose more metrics

Expose "lag as seen by konsumerator" metric.
Expose number of samples received from prometheus for
production/consumption/offsets to know if some timeseries are missing.

fix "expected" counter. fix glimiter value in state

"Expected" value prints number of partitions instead of the number of
instances. Fix this.

state.glimitResources used to contain amount of resources that we
"asked" from glimiter, instead of the actual resources allocated after
the limit was applied. fix this.

go mod vendor

Compare only "requests" during estimateDeploy

Ignore `resource.limits` block during comparison of current vs
estimated, it's always just a rounding of the `request.request` and
causes weird logging when deployment was created with custom values.

Print memory in the logline, since it's also used in the comparison of
resources.

Update different configs to better dev experience

Vendor the dependencies

Merge pull request #40 from lwolf/expose-version-metric

Expose binary version as a metric

rename v1 api to v2 before the actual changes