Fix deprecations on Julia 0.7

v0.6.2

fix deprecations on Julia 0.7 (#50)

Fix deprecations of install script

• Fix deps/build.jl (#48).

ExXML.jl 0.6

• Use pre-built libxml2 binaries (#45).
• Deprecate read(Document) and parse(Document) overloadings (#42).

Bugfix release

• Fix memory management of nodes (#39).

Fix deprecated warnings

• Fix deprecated warnings (#37).

Catch up Julia 0.7 nightly

• Fix most deprecated warnings on Julia 0.7 (#35).

Support Julia 0.7 nightly

• Fix depwarns on Julia 0.7 (current master) #33

Docs fix release

• Add installation steps to README.md (#30).
• Minor spelling corrections (#31).
• Fix a deprecated function call in an example (#32).

Bugfix release

• Do not reuse the context dictionary (fix #28) (#29).

EzXML 0.5

• Drop Julia 0.5 support #24.
• Deprecate name and content in favor of nodename and nodecontent #26.
• Deprecate depth in favor of nodedepth #27.
• Export istext #25.
• Use running julia exec when executing example tests #23.