Add "Atlassian Sourcetree Pros" section into Git Client->Atlassian Sourcetree.
Merge pull request #36 from leoslopez/source-tree-review

Add "Atlassian Sourcetree Pros" section into Git Client->Atlassian Sourc...
Update git-extension-issues.md
Update git-extension-issues.md
Add "solve merge and rebase conflicts" place holder
Add introduction to merge and rebase article