Implement sell buy (Market & Limit) operations#11

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notAmine wants to merge 5 commits intoseansullivan44:masterfrom

notAmine:master

Commits on Dec 22, 2020

implement method to get security id from symbol, place order, buy and sell security
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Commits on Dec 23, 2020

Merge pull request #1 from notAmine/feat_place_order
notAmine
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Commits on Dec 26, 2020

implemented limit sell, limit buy, fixed quote problem for market order.
notAmine
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Commits on Feb 12, 2021

fix
notAmine
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revert fix
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