Fix spelling errors and simplified sentences
Merge pull request #1 from btbinhtran/proofread

Fix spelling errors and simplified sentences
start of cookbook guide
start of cookbook guide
start of cookbook guide
start of resources
start of resources
start of resources
start of resources
start of resources
start of resources
start query guide
start query guide
start query guide
start query guide
start query guide
start query guide
start query guide
start query guide
start query guide