Fix common misspellings

Fix common misspellings

Following misspellings were fixed:

alledgedly->allegedly
cant->can't
carefull->careful
consistant->consistent
currenly->currently
dependancy->dependency
descripters->descriptors
doesnt->doesn't
dosen't->doesn't
existant->existent
exmaple->example
inbetween->between
independant->independent
isnt->isn't
mroe->more
neccessary->necessary
occured->occurred
occurence->occurrence
parrallel->parallel
particualr->particular
preceeding->preceding
recieved->received
recieves->receives
seperate->separate
substraction->subtraction
succesfully->successfully
successfull->successful
sucess->success
supress->suppress
usefull->useful
witht->with

SVN revision: 51986