docs: replace PNGs with code blocks

See merge request picodata/picodata/docs!60

docs: change monitoring script offering

See merge request picodata/picodata/docs!59

docs: review and update cluster tutorial

See merge request picodata/picodata/docs!58

docs: add Picodata cluster tutorial

See merge request picodata/picodata/docs!57

docs: update clustering.md

See merge request picodata/picodata/docs!56

docs: review and update clustering.md

See merge request picodata/picodata/docs!55

docs: update installation section

See merge request picodata/picodata/docs!54

docs: update draft proposal

See merge request picodata/picodata/docs!53

docs: add draft proposal

See merge request picodata/picodata/docs!52

docs: update Sbroad section with more details

See merge request picodata/picodata/docs!51

docs: roll in Sbroad decription

See merge request picodata/picodata/docs!50

docs: pull clustering.md back in

See merge request picodata/picodata/docs!49

docs: update Picodata description part

See merge request picodata/picodata/docs!48

docs: add tests description

See merge request picodata/picodata/docs!47

docs: update PDF set after review

See merge request picodata/picodata/docs!46

docs: update PDF set

See merge request picodata/picodata/docs!45

docs: update site and product description

See merge request picodata/picodata/docs!44

docs: added user manual PDF

See merge request picodata/picodata/docs!43

docs: added install guide in PDF

See merge request picodata/picodata/docs!42