Add support for multi filter in entities

[mohabusama]

Resolve #75

[codecov[bot]]

Codecov Report

Merging #76 into master will increase coverage by 2.13%. The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master      #76      +/-   ##
==========================================
+ Coverage    73.9%   76.04%   +2.13%     
==========================================
  Files          18       18              
  Lines        1054     1056       +2     
==========================================
+ Hits          779      803      +24     
+ Misses        275      253      -22

Impacted Files	Coverage Δ
zmon_cli/cmds/entity.py	55% <83.33%> (+10.12%)	:arrow_up:
zmon_cli/output.py	86.23% <0%> (+10.86%)	:arrow_up:

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[lmineiro]

👍

[mohabusama]

👍