Edited TreeRead

Altered the function TreeRead in preparation for the subfunction for
building trees from PhyloXML files.
Just some placeholder code for the phyloxml capabilities
Added lines to clean up input XML data before it is then processed.
Furthur progress with writing phyxml interpretation function.
Corrected the commit made yesterday.
Finally fixed the structure resolving for phyloXML files.
Edited Readme
Corrected Phylo.jl to Phylogenetics.jl
More code to parse PhyloXML elements
Changes to the in development PhyloXML IO

Deleted old code from treeio.jl & started new file to contain phyloxml
code whilst it is developed. Started new XML parsing code using
LibExpat, finished the CladeTaxonomy type and the code to read in
Taxonomy information for a clade element in PhyloXML format files.
Started the code for reading in Sequence information for a clade
element in PhyloXML format files.
Wrote much more code for reading in data from PhyloXML documents.

Finished 2/3rds of the functions and types needed to read in and encode
phylogenetic trees annotated with rich data. Got all of the sequence
information for clades done except for domain architecture - finished
taxonomy, user defined properties, confidence values, and uri
identifiers.
Error correcting and code simplification.

Code extracting numeric values from PhyloXML elements is now only
consists of one line rather than 2. Ignore develscript.jl it is just a
scratch file to make running through commands when testing, less
tedious.
Yet more code corrected and added for readin in XML files - finished first version of the Property type.
Phyxml commit
Merge branch 'master' into phyxml

Conflicts:
	README.md
	src/Phylogenetics.jl
	src/treeio.jl
	src/typedefs.jl
Merge pull request #5 from Ward9250/phyxml

Phyxml