edited --de_novo_otu option
edited RAM limit to accept floats for memory for supporting scientific notation input
fix pointer increment past allocated memory for traversing alignments
Merge pull request #1 from ekopylova/issue-18

Issue 18
free memory for each alignment array pointed to by s_align* (in map<uint32_t, pair<uint16_t, s_align*> > read_hits_align_info) after writing all alignments to file
Merge pull request #2 from ekopylova/issue-18

free memory for each alignment array pointed to by s_align* (in map<uint...
issue 18 resolved
Merge pull request #3 from ekopylova/issue-18

issue 18 resolved
Merge pull request #19 from ekopylova/master

resolved issue 18 + other small changes