fix error handling to raise error when parsing file is not found
add cursor functions except for obj-c
add tests for cursor functions
Merge pull request #9 from sabottenda/cursor_functions

Add cursor functions provided for C/C++
change travis.yml to use multi versions of libclang
add attributes of TranslationUnit reference to Cursor and Type
add an attribute of Index reference to TranslationUnit
Merge pull request #11 from sabottenda/tu-ref

Add attributes of reference to dependent object
Merge pull request #10 from sabottenda/travis

change travis.yml to use multi versions of libclang
add copyright to README
add clang version string apis
fix failing tests for 3.2 and 3.3
Merge pull request #12 from sabottenda/fix-tests

Fix failing tests with libclang 3.2 and 3.3
Bump version.