Initial commit.
Add dummy svndump parser.
Ignore build artifacts.
Implement linear history parser.
Add platform-specific CPPFLAGS and LDFLAGS.

* use apr-1-config to find Apache Runtime include path and flags;
* check for Darwin ports paths;
* check for Linux headers paths.
Support libsvn version 1.7 and older.
Notify about skipping revisions.
Fix directory replacing and deleting.
Do not use assignment in condition.
Quote node paths.
Update README.
Strip reduntant linebreaks.
Simplify parser usage.
Do not expose parser context in headers.
Add branch support.
Fix callbacks initialization for Subversion 1.7 and older.
Get rid of some temp variables.
Avoid uploading already uploaded blobs.
Add functions for node kind and action parsing.
Add mark and revnum types.