Merge pull request #19 from afan004/master

added 3rd example
change external link behavior
what is humor
Merge pull request #20 from htsai010/master

external links handled correctly now
changed some ordering around
more feedback changes
fixed links and removed placeholdercode ^^:
Merge pull request #21 from htsai010/master

fixed links and removed placeholdercode ^^:
added correct memory leak code and explanation
Merge pull request #22 from htsai010/master

added correct memory leak code and explanation
Changed order of some sections and removed what was deemed unneeded
forgot one source code re-organizing
wording
wording
fixed links
Merge pull request #23 from htsai010/master

fixed links and code character
Updated example4.cpp to be put in
Updated grammar
Fixed grammar
Merge pull request #24 from lpeng003/master

Ex4