Add a few files created by "make verify" to .gitignore.
Use FindClose for handle from FindFirstFile in http-server.c

Noted by Miles Chan as issue #145
Consistently check for failure from evbuffer_pullup()

Closes issue #148.
regress_buffer: fix 'memcmp' compare size
[Bugfix] fix bufferevent setwatermark suspend_read
fix pthread build under ming-w64